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Appendix A

PLT-22 Transceiver Isolation Transformer

Specifications

This appendix provides a schematic, specifications and supplier

information for the PLT-22 transceiver isolation transformer.

ORKS

PLT-22 Transceiver User’s Guide

A-1

Summary of Contents for LONWORKS PLT-22

Page 1: ...LONWORKS PLT 22 Power Line Transceiver User s Guide 110kHz 140kHz Operation Version 1 2 ECHELON C o r p o r a t i o n 078 0175 01C...

Page 2: ...such applications Parts manufactured by vendors other than Echelon and referenced in this document have been described for illustrative purposes only and may not have been tested by Echelon It is the...

Page 3: ...ncy Mode 3 2 CENELEC Access Protocol 3 3 Power Management 3 3 Standard Transceiver Types 3 4 LonBuilder and NodeBuilder PLT 22 Transceiver 3 6 Channel Definitions 4 Coupling Circuits 4 1 Power Line Co...

Page 4: ...est for Electromagnetic Compatibility 6 1 EMI Design Issues 6 2 Designing Systems for EMC Electromagnetic Compatibility 6 2 ESD Design Issues 6 4 Designing Systems for ESD Immunity 6 4 Conducted Emiss...

Page 5: ...ng Circuit Components Key B 5 Specifications PLT 22 Transceiver Power Supply General B 6 PLT 22 Transceiver Power Supply Switching Type B 6 EMI ESD Design B 7 Product Qualification EMC B 8 Product Qua...

Page 6: ...iv Echelon...

Page 7: ...a are broadcast through the power mains eliminating the need for dedicated wiring and greatly reducing installation costs A replacement for Echelon s popular PLT 21 Power Line Transceiver the PLT 22 t...

Page 8: ...ncy bands The transceiver implements the CENELEC access protocol which can be enabled or disabled by the user By incorporating the access protocol into the power line transceiver Echelon has eliminate...

Page 9: ...nd With the CENELEC protocol enabled the transceiver has a maximum throughput of 18 packets per second This high throughput makes the transceiver well suited for residential commercial and industrial...

Page 10: ...r must be mounted using hand or wave soldering and requires only the addition of a Neuron 3120 Chip or Neuron 3150 Chip crystal power line coupling network power supply and application electronics to...

Page 11: ...cy range of 110kHz to 140kHz 100kHz 200kHz 300kHz 400kHz 500kHz 600kHz 700kHz Restricted PLT 22 Transmit Signals General Use Restrictions Under Consideration Figure 1 3 FCC and Industry Canada Frequen...

Page 12: ...ers of products using the PLT 22 Power Line Transceiver Content This manual provides detailed operating instructions for the PLT 22 transceiver Related Documentation The following documents are sugges...

Page 13: ...0024 01 LONMARK Layers 1 6 Interoperability Guidelines 078 0014 01 LONMARK Application Layer Interoperability Guidelines 078 0120 01 Neuron Chip Data Book as published by Motorola and Toshiba LONWORKS...

Page 14: ...1 8 Introduction...

Page 15: ...scribes the mechanical and electrical characteristics of the PLT 22 transceiver along with the interface to a Neuron Chip and external circuitry requirements Typical application schematics are include...

Page 16: ...1 transceivers Figure 2 1 PLT 22 Transceiver Dimensions Note If a socket is required for prototype purposes a Mill Max 317 93 121 41 005 connector may be used For more information contact Mill Max Man...

Page 17: ...a and status to Neuron Chip RXD 8 GND Ground 9 VDD5 5VDC power supply input 10 CKOUT Buffered CMOS clock output 10 5 2 5 or 1 25 MHz 11 CKSEL0 Selects frequency of CKOUT see table 2 4 12 CKSEL1 TXON S...

Page 18: ...p Output impedance in band transmit 0 9 1 1 Ohms Input impedance in band receive 500 Ohms PKD output source current VDD5 0 6 V 8 mA BIU output source current VDD5 0 6 V 8 mA Power management lower thr...

Page 19: ...amplifier headroom when driving low impedance power lines When using an energy storage type power supply refer to Chapter 5 for additional timing requirements on the above conditions 50 60 70 80 90 4...

Page 20: ...ively contains two 32pF capacitors one from XIN to ground and one from XOUT to ground Note that the series combination of the two capacitors equals the load capacitance of the recommended crystal Rece...

Page 21: ...the use of an aluminum electrolytic type capacitor with a voltage rating of 16V Higher or lower voltage ratings will likely result in surge immunity which is significantly below the verified levels d...

Page 22: ...n diodes should be connected to these pins in applications where the BIU and PKD signals drive LEDs that could be subject to ESD exceeding 2kV In applications where the LEDs are surrounded by a metall...

Page 23: ...r higher The PLT 22 transceiver RESET pin is designed to connect directly to the Neuron Chip RESET pin The Neuron Chip Data Book 2 3 18 provides information on the Neuron Chip s external reset circuit...

Page 24: ...CKSEL1 TXON pin The CKSEL1 TXON pin functions as an input during the period in which the RESET pin of the PLT 22 transceiver is held active low During the reset active period the logical states of th...

Page 25: ...51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 46 D0 D1 D2 D3 D4 D5 D6 D7 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 Coupling Circuit MC33064D 1 2 3 5V 10...

Page 26: ...Chapter 4 5V 5V open 5V open 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 CP4 CP3 CP2 CP1 CP0 VDD VDD VSS IO5 IO6 IO7 IO8 IO9 IO10 Neuron 3120 Chip SERVICE VSS VSS CLK1 CLK2 VDD VDD IO0 IO1 IO2 IO3...

Page 27: ...sceiver are programmed by the user This chapter presents a list of these parameters and their values plus a description of how they are programmed via the LonBuilder Developer s Workbench and the Node...

Page 28: ...he first and third packets being sent using the 132kHz primary carrier frequency while the second and fourth packets are sent using the 115kHz secondary carrier frequency A minimum of one repeat must...

Page 29: ...The PLT 22 transceiver incorporates a power management feature that supports the design of very low cost power supplies in low cost consumer applications such as networked light dimmers switches and...

Page 30: ...never be programmed to enable the power management feature as they may never be allowed to transmit Likewise a node whose power supply relies on power management to operate correctly should never be...

Page 31: ...s section of Echelon s web site www echelon com to determine how to update other devices used in a PLT 22 power line network With dual frequency mode activated a PLT 22 transceiver begins each transac...

Page 32: ...ile earlier than 1999 will transmit using only a single carrier frequency even if it is blocked by noise To take advantage of the PLT 22 transceiver s ability to automatically change frequency if the...

Page 33: ...een and sub screens to create a standard PLT 22 transceiver definition which will activate the PLT 22 transceiver s dual frequency mode Table 3 3 Channel Definition Parameters for the PLT 22 Transceiv...

Page 34: ...determ Time 10 1 bits Min Interpacket 17 5 bits Preamble Len 33 5 bits Use Raw Data No The standard transceiver definitions in table 3 1 were chosen as the best balance between flexibility in network...

Page 35: ...ludes a technical discussion about the means by which communication signals are coupled to power mains Coupling circuit designs including schematics and electrical safety issues are included LONWORKS...

Page 36: ...nveniently denoted in decibels dB where voltage attenuation is defined in dB as 20log10 Vtransmit Vreceive Thus 20dB of attenuation means that the signal was reduced by a factor of 10 by the time it a...

Page 37: ...e PLT 22 transceiver 110kHz to 140kHz the significant impedances are due to the series inductance of the mains wiring itself capacitive loads between line and neutral resistive loads between line and...

Page 38: ...transceiver s communication signal Figure 4 3 below shows a basic mains coupling circuit The value of the capacitor is chosen to be large enough so that its impedance at the communication frequencies...

Page 39: ...ent and accessible i e safety ground which is not the same as a neutral wire with an earth bond and wiring systems where there is no earth conductor When earth is always present a coupling method know...

Page 40: ...improvements in received signal to noise ratios of more than 15dB for transceivers using line to earth coupling relative to transceivers using non earth return coupling For this reason when a safety g...

Page 41: ...neutral coupling and line to earth coupling as the coupling circuit topology for each is the same However in addition to the different mains connections the required component values differ for line...

Page 42: ...Since the equivalent load impedance of the power line may in some cases be as low as 1 2 Ohms and since the output impedance of the PLT 22 transceiver is less than 1 Ohm the impedance of these capacit...

Page 43: ...OUT pin of the PLT 22 transceiver and the power mains or in the return path from the power mains to the ground pins of the PLT 22 unless verified to be significantly less than 1 Ohm near 130kHz If for...

Page 44: ...scharge through diode D1 The last addition is an optional circuit that improves performance in environments where large 50V impulses may be present from devices such as SCR controlled light dimmers Th...

Page 45: ...ial inductor does not need this extra operating margin due to the linearity provided by its magnetic path being partly in air Safety Issues This guide is intended only as an introduction to some of th...

Page 46: ...L1 see Appendix A Transformer isolation can be used for both line to neutral and line to earth coupling Transformer isolated coupling has the advantage that the resonant inductor L2 can be incorporat...

Page 47: ...ions also may prohibit to the use of earth as the return path for a signaling system Capacitor Charge Storage The coupling capacitors depicted in the earlier figures can retain substantial charge even...

Page 48: ...orm either Ring wave or Combo wave surge voltage and surge current In addition to describing standard test methods both documents also suggest surge immunity levels for the device environments describ...

Page 49: ...circuits is often prohibited Adequate surge immunity in branch circuit applications may be achieved without varistors by the use of an X2 type capacitor instead of a non safety rated metalized polyest...

Page 50: ...be necessary to avoid unintentional fusing action at high system exposure levels of IEEE C62 41 1991 If a coupling circuit which incorporates varistor protection is selected the varistor manufacturer...

Page 51: ...lding Applications with LONWORKS PLT 21 Power Line Transceiver 005 0056 01 is recommended Recommended coupling circuits for applications where two out of phase hot lines are used e g North American 24...

Page 52: ...120VAC refer to table 4 4 This schematic may also be used for coupling to wiring other than AC mains with AC or DC voltages of 250VRMS or less Transmit Amp Receive Front End PLT 22 C1 C2 L1 L2 TXOUT R...

Page 53: ...0 82 F 5 50VDC metalized polyester Matsushita Electric ECQ V1H824JL C3 120 F 20 16VDC aluminum electrolytic 0 3 ESR 100kHz Matsushita Electric ECA 1CFQ121 C4 0 10 F 5 50VDC AVX SR205C104JAA D1 1A Rev...

Page 54: ...2 T1 TXOUT RXIN RXCOMP L3 Line Neutral D1 R1 PROTECT F1 L4 C4 R2 C3 VA See note below Note This optional circuit should be added to nodes with a nominal VA 12V or nodes that contain a triac or SCR loa...

Page 55: ...F 5 50VDC metalized polyester Matsushita Electric ECQ V1H824JL C3 120 F 20 16VDC aluminum electrolytic 0 3 ESR 100kHz Matsushita Electric ECA 1CFQ121 C4 0 10 F 5 50VDC AVX SR205C104JAA D1 1A Reverse...

Page 56: ...AC refer to table 4 8 This schematic may also be used for coupling to wiring other than AC mains with AC or DC voltages of 250VRMS or less Transmit Amp Receive Front End PLT 22 C1 C2 L1 L2 TXOUT RXIN...

Page 57: ...e breakdown 50V surge current 30A for 8 3mS reverse recovery 200nS 1N4935 F1 6A 125VAC slow blow 2 L1 L3 L4 1 0mH 10 Imax 30mA RDC 50 TAIYO YUDEN LAL03NA102K L2 18 H 10 Imax 500mA RDC 0 3 TAIYO YUDEN...

Page 58: ...inal line voltage in the range of 100 120VAC refer to table 4 10 This schematic may also be used for coupling to wiring other than AC mains with AC or DC voltages of 250VRMS or less Transmit Amp Recei...

Page 59: ...p Value Specifications Vendor Part Number C1 0 068 F 10 250VAC X2 type 1 Nissei Denki Arcotronics R40683K275XXXX C2 0 82 F 5 50VDC metalized polyester Matsushita Electric ECQ V1H824JL C3 120 F 20 16VD...

Page 60: ...g of R1 must be chosen to meet the high pot testing requirements of the application 5 High pot manufacturing tests must be performed proir to installation of this gas discharge tube High pot testing b...

Page 61: ...Transceiver This chapter discusses options and requirements for the PLT 22 transceiver power supply At the end of the chapter requirements for conducted emissions testing are discussed LONWORKS PLT 2...

Page 62: ...ectly connected to the communications channel it has the potential both to attenuate the transmit signal and to couple noise into the input of the receiver Likewise the power supply outputs VDD5 and V...

Page 63: ...red receive mode current plus an incremental current to recharge a capacitor between transmissions In order for this energy storage architecture to work consideration must be given to the capacitance...

Page 64: ...otocol service in use Even when unacknowledged service is employed a packet that is interrupted by VA droop will be re transmitted once the power management system determines that the supply has fully...

Page 65: ...ive feature of this supply is that both VA and VDD5 supplies can be built with just a few components for approximately US 1 00 2 00 Figure 5 2 illustrates the operation of a capacitor input power supp...

Page 66: ...0 Chip and powered by a capacitor input power supply This node is designed to operate with an internal box air temperature range of 0 70 C The coupling circuit shown in this figure is different from t...

Page 67: ...LONWORKS PLT 22 Transceiver s User Guide 5 7 Figure 5 3 Capacitor Input Power Supply Schematic...

Page 68: ...with a 100mA transformer Figure 5 4 shows an example of an energy storage linear supply This example supply meets the criteria listed in the energy storage section of this chapter With a transient lo...

Page 69: ...For these reasons a linear power supply may be used without concern that communication performance will be adversely affected Switching Power Supplies While generally smaller than linear power suppli...

Page 70: ...a current rating which is greater than the peak current drawn by the power supply in order to avoid impedance reduction due to inductor saturation Higher impedances require larger inductance values w...

Page 71: ...communication frequency with a capacitor as shown in figure 5 6 If this option is chosen resistive damping must be included so that impulsive power line noise does not excite excessive filter ringing...

Page 72: ...of that switching supply avoid the transceiver s communication frequencies the amount and cost of additional circuitry to filter interference from the switching supply can be minimized Table 5 4 belo...

Page 73: ...limits required to maintain full performance if the transceiver is used only in its single carrier frequency mode If the PLT 22 transceiver is going to be used in its dual carrier frequency mode then...

Page 74: ...itching Power Supply Input Noise Limits for CENELEC EN 50065 1 Compliance 20 30 40 50 60 70 80 90 100 110 1 0E 03 1 0E 04 1 0E 05 1 0E 06 1 0E 07 1 0E 08 Frequency Hz Single carrier frequency mode Dua...

Page 75: ...y Noise Level dBuV Quasi Peak Detector 9 100 89 40 100 76 40 80 76 50 80 75 50 80 75 110 80 68 110 80 30 125 80 30 125 30 30 140 30 30 140 70 60 450 70 60 450 48 48 30000 48 48 A power supply that doe...

Page 76: ...se drops by less than the values shown in figure 5 10 it is likely due to parasitic coupling between the two inductors If this occurs filtering close to the level shown in figure 5 10 can usually be a...

Page 77: ...these power supply outputs must be controlled in order to comply with CENELEC EN 50065 1 or FCC conducted emission limits as well as to achieve maximum communication performance Noise masks are provi...

Page 78: ...5 11 VDD5 Power Supply Noise Limits vs Frequency for CENELEC EN 50065 1 Compliance 40 50 60 70 80 90 100 110 1 0E 04 1 0E 05 1 0E 06 Frequency Hz Single carrier frequency mode Dual carrier frequency...

Page 79: ...75 37 50 80 75 50 110 90 75 110 125 90 45 125 140 50 45 140 325 80 75 325 1000 80 65 Table 5 9 and 5 10 list the levels shown on the graphs following in figures 5 13 and 5 14 respectively Table 5 9 VA...

Page 80: ...re 5 13 VA Power Supply Noise Limits vs Frequency for CENELEC EN 50065 1 Compliance 30 40 50 60 70 80 90 100 110 1 0E 04 1 0E 05 1 0E 06 Frequency Hz Single carrier frequency mode Dual carrier frequen...

Page 81: ...on including schematic and parts list is available from Power Integrations in design note DN 15 TOPSwitch Power Supply for Echelon PLT 21 Power Line Transceiver This design note is available on the Po...

Page 82: ...e other options outlined in this chapter are suitable If this option is chosen it is recommended that it only be pursued by experienced switching supply and electromagnetic compatibility experts Even...

Page 83: ...iated electromagnetic interference EMI and electrostatic discharge ESD design practices for products containing the PLT 22 transceiver These design practices help the designer to create a product with...

Page 84: ...g out of the product enclosure It is very important to minimize the leakage capacitance from circuit traces in the node to any external metal near the node because this capacitance provides a path for...

Page 85: ...the Neuron Chip If a two layer PCB is being used CKOUT can be routed to the Neuron Chip with ground guard traces straddling the clock trace on the component side of the board and a wide ground trace...

Page 86: ...s occur frequently in low humidity environments when operators touch electronic equipment Keyboards connectors and enclosures may provide paths for static discharges to reach ESD sensitive components...

Page 87: ...s If the node is floating with respect to earth ground then the ESD current will return capacitively to earth via the power supply wires and or the PCB ground plane Explicit clamping of user accessibl...

Page 88: ...n re measure emissions There is an overload problem if the level of emissions at frequencies other than the main carrier has decreased by more than the increase in attenuation Most spectrum analyzers...

Page 89: ...s even very expensive ones do not meet this requirement The Rohde Schwarz EMI Test Receiver ESHS30 has been found to have adequate filter skirts Although its specification does not guarantee adequate...

Page 90: ...5000pF be used since they will result in excessive signal attenuation Table 6 1 EMC Suppression Capacitor Value versus Application Application Network Impedance 130kHz Capacitor Impedance 130kHz Capac...

Page 91: ...Coupling Circuit Power Mains PLT 22 Coupling Circuit Unacceptable Topology Unacceptable Topology Unacceptable Topology Power Mains PLT 22 Coupling Circuit Acceptable Topology Figure 6 3 Ferrite Bead T...

Page 92: ...6 10 Design and Test for Electromagnetic Compatibility...

Page 93: ...ommunication Performance Verification This chapter describes procedures to verify basic communication performance of products based on the PLT 22 transceiver LONWORKS PLT 22 Transceiver User s Guide 7...

Page 94: ...ontacting your Echelon sales representative to make arrangements to send the node to Echelon for confidential evaluation This chapter describes a simple black box testing methodology for determining w...

Page 95: ...f PLCA 22 analyzers communicating between the power mains input and the output To perform this verification set the PLCA 22 analyzer that is connected to the input side of the isolator to send packets...

Page 96: ...r and are not recommended for this test The PLCA 21 lacks the features required to perform these tests accurately and should not be used One PL 20 Line to Neutral power line coupler Echelon model 7820...

Page 97: ...th the output path of a PLCA 22 analyzer effectively increases its output impedance This will allow for a more sensitive measurement of the receive mode impedance of the product under test 88 7 1 1 4W...

Page 98: ...on performance or that of other devices on the power mains 1 Connect a single PCLA 22 analyzer the UUT and the Isolator as shown in figure 7 6 Verify that the anlayzer is set for C band operation by o...

Page 99: ...present on the power input side of the isolator are not sufficiently attenuated Ensure that no other power line signaling equipment is operating on the power mains when performing this test The isola...

Page 100: ...al coupling as shown in figure 7 7 Connect the impedance circuit 88 7 resistor figure 7 4 and the coupling circuit as shown This test is best conducted with the CENELEC protocol turned off in order to...

Page 101: ...s packet detect LED Recv See text before powering unit PLCA 22 Send Impedance Circuit see fig 7 4 coax coax TxVpp 10V PL 20 L N 240V Coupler Isolated Power Line C band C band Figure 7 7 Excessive Load...

Page 102: ...e the primary signal strength LEDs on the PLCA 22 analyzer and check which of the primary LEDs illuminate If the UUT is configured for 3 5Vp p output TXLVL pin 21 on the PLT 22 transceiver is left ope...

Page 103: ...d by a description of the verification procedure Packet Error Measurement with Nodeutil A DOS utility called nodeutil exe will be used to measure packets correctly received by the UUT The Nodeutil sof...

Page 104: ...t domain G G o to node menu H H elp with commands L Display node L ist M Change node M ode or state O Redirect O utput to a file P Send a service P in message from a PCLTA R R eboot 3150 node S Report...

Page 105: ...d by the UUT since the last time the statistics were cleared Type Y at the prompt to clear the status of the UUT The S command will be used in the next few steps to obtain the received packet count fr...

Page 106: ...3 5 PL 20 L N 240V Coupler coax PL 20 L N 240V Coupler PC containing one of the following network interface cards PCLTA PCNSS PCNSI Attenuation Circuit see fig 7 5 Isolated Power Line To power mains C...

Page 107: ...e percentage of missed packets is generally negligible Under conditions where the packet error rate is greater than 10 a significant portion of the error rate may be due to missed packets The Packets...

Page 108: ...in tables 7 1 and 7 2 is the sum of the attenuation level of the attenuator circuit and the Attn level of the Send PLCA 22 analyzer A properly performing product will show a low level of CRC errors 3...

Page 109: ...sks of Chapter 5 have been met Compare the values of the coupling circuit components with those recommended in Chapter 4 It is possible that the wrong value component was inserted and partial if compr...

Page 110: ...7 18 Communication Performance Verification...

Page 111: ...8 References This section provides a list of the reference material used in the preparation of this manual LONWORKS PLT 22 Transceiver User s Guide 8 1...

Page 112: ...n note may be obtained by contacting Clay Bilby EMC Applications Engineer Santa Rosa Systems Division Hewlett Packard Company 1400 Fountaingrove Parkway Santa Rosa California 95403 Main telephone numb...

Page 113: ...ng and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test International Standard First Edition 1995 02 15 CEI IEC 1000 4 4 Electromagnetic compatibility Part...

Page 114: ...8 4 References...

Page 115: ...Transceiver Isolation Transformer Specifications This appendix provides a schematic specifications and supplier information for the PLT 22 transceiver isolation transformer LONWORKS PLT 22 Transceiver...

Page 116: ...er Schematic shown above Parameter Min Typ Max Units Turns Ratio 1 2 3 4 1 0 DC Resistance 1 2 3 4 0 20 0 20 Ohm Ohm Magnetizing Inductance 1 2 Dry 100kHz 1Vrms 0 75 1 0 1 25 mH Magnetizing Inductance...

Page 117: ...ois 60481 0505 0671 Telephone 1 708 980 6448 Fax 1 708 980 6485 EXCEL Electric Corporation 6501 N W 13th Court Plantation Florida 33313 EXL 165 Telephone 1 954 581 2330 Fax 1 954 581 2355 Transpower T...

Page 118: ...A 4 Appendix A...

Page 119: ...ransceiver Based Node Checklist This appendix includes a checklist to ensure that products using the PLT 22 transceiver meet the specifications presented in this user s guide LONWORKS PLT 22 Transceiv...

Page 120: ...ecting the crystal to the transceiver are not greater than 20mm 0 8 in length 8 External 120 F minimum 16VDC aluminum electrolytic low ESR 0 3 100kHz VA capacitor is used The capacitor must be exactly...

Page 121: ...supply rail 21 A Low Voltage Interrupt LVI circuit with open collector output such as the Motorola MC33064 is used to supply a reset signal to both the Neuron Chip and the transceiver 22 Two external...

Page 122: ...em Check When Completed Description 26 A coupling circuit that is suitable for the intended application is selected and coupling circuit components meet the specifications shown in chapter 4 as approp...

Page 123: ...er required for surge immunity Proper value selected Proper tolerance Proper voltage rating 34 Capacitor C4 Value such that C4 L4 C1 L1 5 tolerance 50VDC rating 35 Inductor L1 L3 L4 1 0mH value DC cur...

Page 124: ...hen Completed Description 43 If a linear supply has been used skip the remaining power supply check list sections PLT 22 Transceiver Power Supply Switching Type Item Check When Completed Description 4...

Page 125: ...er supply input a correct filter is installed between the local switching power supply and the power line 52 All output noise masks shown in chapter 5 are satisfied using measurements taken over the f...

Page 126: ...asurements are made with a quasi peak detector and the average detector as specified in CISPR Publication 16 61 FCC measurements are made with a 9kHz bandwidth filter as specified The CENELEC EN 50065...

Page 127: ...rcuits This appendix provides source information about plug in AC to DC power supplies in which a Line to Neutral coupling circuit compatible with the PLT 22 Power Line Transceiver is integrated into...

Page 128: ...arketing Sales Group 5 5 30 Chiyoda Sakado shi Saitama 350 0214 Japan North America 425A12400P Input 120VAC 10 60Hz 0 5Hz Output 12 5VDC 400mA Coupling Circuit Line to Neutral Telephone 81 492 84 5721...

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