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TXP-C20_Instruction_Manual_(Rev1.0)

REV – 1.0

[34-2900-0207-5 ]

29

|

P a g e

Figure 4-8 – Optional Modbus RS-232 /RS-485 interface Board

4.2.1

Modbus Register and Function Code Summary

The following table identifies TXP-C20 Modbus register locations and function codes.

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Summary of Contents for TracXP TXP-C20

Page 1: ...IMPORTANT Read and understand contents of this manual prior to operation Keep these user instructions for reference TracXP TXP C20 Dual Channel Controller Instruction Manual ...

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Page 4: ...ark not defined 3 2 Sensor Location 9 3 3 Mounting the Enclosure 11 3 4 Sensor Installation 11 4 General Operating Instructions Error Bookmark not defined 4 1 Introduction Error Bookmark not defined 5 1 Key Features Error Bookmark not defined 6 1 Relay 1 2 3 Error Bookmark not defined 6 1 1 Alarm 1 2 3 Fault Error Bookmark not defined 6 1 2 Acknowledge Error Bookmark not defined 6 1 3 Failsafe Err...

Page 5: ...ENTION GARDEZ LE COUVERCLE ANTI EXPLOSION SERRÉ PENDANT QUE LES CIRCUITS SONT VIVANTS CAUTION USE SUPPLY WIRES SUITABLE FOR 40 C ABOVE SURROUNDING AMBIENT ATTENTION UTILISER DES FILS D ALIMENTATION QUI CONVIENNENT A UNE TEMPERATURE DE 40 C AU DESSUS DE LA TEMPERATURE AMBIANTE WARNING EXPLOSION HAZARD SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS I DIVISION 2 AVERTISSEMENT RISQUE D EX...

Page 6: ...E FUSE UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON HAZARDOUS WARNING EXPLOSION HAZARD DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON HAZARDOUS Use a properly rated CERTIFIED AC power mains cable installed as per local or national codes For DC powered units DC power must be from a SELV rated source A certified AC power mains disco...

Page 7: ...ations Real Time Clock and Calendar are also standard Options such as 4 20mA outputs discrete relays for each alarm and audible annunciators are easily added RS 485 Modbus RTU or Ethernet Modbus TCP ports are also available for sending data to PC s PLC s DCS s or other Macurco Gas Detection controllers A 128 x 64 pixel graphic LCD readout displays monitored data as bar graphs 30 minute trends and ...

Page 8: ...1 0 REV 1 0 34 2900 0207 5 6 P a g e Figure 2 2 TXP C20 Display Board 2 1 Data Display Screens The TXP C20 Controller offers three modes for displaying monitored data Each are shown below in Figure 2 3 Figure 2 3 Data Display Screens ...

Page 9: ...eters and having only the Blind Mode screen available for viewing 2 4 Specifications 2 4 1 Power Supply Requirements TXP C20 primary power may be either 10 30 VDC or 100 240VAC AC power requirements are 100 240 VAC 50 60 Hz 80 amp max including inrush and 40 watts max steady state applied to TB5 on the motherboard If AC power is not available the primary power may be 10 30 VDC applied to TB1 on th...

Page 10: ...des dedicated Form C relays for ALARM 1 ALARM 2 and FAULT for both channels All mechanical dry contact relays are rated at 5 Amp for 28 VDC and 250 VAC RESISTIVE loads IMPORTANT Appropriate diode DC loads or MOV AC loads snubber devices must be installed with inductive loads to prevent RFI noise spikes Optional solid state relays are rated at 2 Amp 12 280 VAC 600Vpk Relay wiring should be kept sep...

Page 11: ...ged by pressing the ALARM RESET key A SECURITY menu offers a password feature to prevent tampering with TXP C20 parameters Several signal conditioning input options are available to allow the TXP C20 accept sensor and other analog signals directly see section 4 1 A sign on screen appears briefly after power is applied that indicates what type input output options the unit is configured with 3 2 Se...

Page 12: ...TXP C20_Instruction_Manual_ Rev1 0 REV 1 0 34 2900 0207 5 10 P a g e Figure 3 1 Menu Tree ...

Page 13: ...e cursor to the next position within a field When the field is complete EDIT clears the cursor and loads the field into non volatile memory where it is retained indefinitely Without a cursor present the NEXT key closes open menus in reverse order and returns the LCD to the data display 3 3 1 TXP C20 Setup Configuration Menus The SETUP menu shown in the middle of Figure 3 1 and in Figure 3 2 below ...

Page 14: ...larm level is 10 ppm the correct entry is 10 00 A one percent dead band prevents alarm chatter This means after tripping an alarm the input must move at least 1 of full scale back through the setpoint for the alarm to auto reset The ON Delay OFF Delay entries allow ON and OFF time delays affecting how long the trip point must be surpassed before an alarm event transition occurs ON delays are limit...

Page 15: ...e the units of measure for what this channel is to display Several standard Eunits fields are available by pressing EDIT but if these are inappropriate a CUSTOM field allows editing of each character Section 2 2 describes how to modify these fields using the keypad 3 3 4 2 Input Measurement Range The ZERO SPAN menu entries allow configuration of the measurement range displayed by this channel Meas...

Page 16: ... the same engineering units as input range Figure 3 6 CAL Setup Screen 3 3 6 Calibrate Input Menu Calibration is the most important function ensuring correct operation of TXP C20 s equipped with sensor inputs The CAL MODE flow chart shown in Figure 3 7 is designed to make calibration quick easy and error free A successful ZERO and SPAN calibration requires only five keystrokes Optional 4 20mA outp...

Page 17: ... 5 liters min After the reading is stable approximately 1 minute press the EDIT key to perform a SPAN calibration WARNING The SPAN gas used must match the value specified since this is what the TXP C20 will indicate after a successful SPAN calibration The Span Gas value may be edited if it becomes necessary to apply a different gas concentration see Span Gas in section 2 2 5 5 If the SPAN calibrat...

Page 18: ...ed only once Figure 3 9 Relay Menus Screen The Set Relay Logic menu shown below in Figure 3 10 offers additional voting flexibility by controlling the channel alarm combinations that will trip this common alarm relay OVR on the menu s right side stands for override and means ANY of the selected alarms will activate the relay The OR AND columns work together based upon the following logic equation ...

Page 19: ...activated during alarm conditions by an Alarm Reset This is useful if another audible device is being driven by the relay The acknowledge feature is not available for Relay 1 since it is often used for driving a warning light and Relay 2 for driving a horn It could be dangerous if an operator acknowledged the horn AND the light since no indication of the high alarm condition remains 3 4 2 Horn Pie...

Page 20: ...ers to be connected to a single RS 485 cable Figure 3 12 Communications Screen 3 4 4 Clock Delay Menu The TXP C20 monitors signals from sensors that may require varying times to stabilize after power is applied The Warmup Delay menu item allows setting how long alarm relays remain disabled after power is applied Cal Delay determines how long alarm relays are inhibited after completing a calibratio...

Page 21: ...et the Output Zero DAC value for 4mA on each channel then set the Output Span DAC value for 20mA on each channel These menu items may also be used to drive 4 20mA into receiver devices without stimulating sensor inputs Input Min Max ADC analog to digital converter menu items are set at the factory with default values for each channel of either 200 to 1000 counts or 400 to 2000 counts Direct sensor...

Page 22: ...nfirmed in this menu item locks all menus Viewing menus is not denied but attempts to edit variables flashes the Locked message on the LCD Authorized individuals locking the system should first enter a name phone or other contact information into the 12 character field on the top line of the Security screen To lock or unlock the system the correct 4 digit authorization number must be entered into ...

Page 23: ...liary Power Output terminals If AC power is unavailable or if a DC battery back up supply is needed TB1 provides terminals for DC power input Blocking diodes isolate internal and external DC supplies as shown in Figure 4 1 See section 1 2 1 for additional power source information Figure 4 1 Motherboard Power Connection TB2 offers field terminals for a remote alarm reset switch The motherboard also...

Page 24: ...TXP C20_Instruction_Manual_ Rev1 0 REV 1 0 34 2900 0207 5 22 P a g e Figure 4 2 Motherboard ...

Page 25: ... Analog input PCB option shown in Figure 4 3 allows interfacing TXP C20 s to field transmitters having 4 20mA or voltage outputs Remove socketed 100 ohm R1 or R2 terminators for 0 4 VDC max voltage inputs The dual 4 20 mA input board utilizes a 12 bit A D converter such that 4mA provides 400 counts and 20mA 2000 counts Min Max raw counts menus default to 400 2000 but may be adjusted between 0 4095...

Page 26: ...sult factory if sensor gas type is to be changed after shipment Fault supervision circuitry forces the TXP C20 into a FAULT condition upon sensor failure or removal The Bridge EC input option may also be configured to accept 4 20mA inputs for mixing a direct sensor input and a current loop into the same board Placing either channel s 2 position SENSOR 4 20mA jumper JP4 or JP5 into the 4 20mA posit...

Page 27: ...ting remote sensors apply power to the system Measure the voltage between each channel s A and R terminals and set the Voltage Adjust potentiometers for the correct sensor excitation voltage remove TXP C20 terminal cover This may range from 1 5 volts to 7 5 volts depending upon sensor specifications Sensors may be damaged by accidental over voltage conditions It is recommended the Voltage Adjust p...

Page 28: ...r removal This option may also be configured to accept 4 20mA inputs for mixing an electrochemical sensor and a current loop into the same board Placing any channel s 2 position TOXIC 4 20mA jumper into 4 20mA position and installing the associated precision 100 ohm socketed resistor allows 4 20mA signals to be applied to its mA mA terminals Bridge amplifiers are bypassed in this configuration 4 1...

Page 29: ... PCB s may only be installed into motherboard position P2 An optional 10 bit 4 20mA analog output board shown in Figure 4 8 may be added Each channel s output will transmit 4mA for 0 readings and 20mA for 100 readings If the TXP C20 primary power is 100 240 VAC or at least 24 VDC 4 20mA outputs are capable of driving 20mA through a 750 ohm load Outputs are self powered and DC power should not be p...

Page 30: ...he upper right corner of the TXP C20 motherboard TB1 provides two pairs of T Rx terminals and a floating terminal for shield continuation This makes it easy to multi drop TXP C20 s onto an RS 485 cable without doubling wires into the same screw terminals RS 232 interface may be made by connecting to DB9 connector S1 Section 3 2 1 lists all Modbus registers and their function codes Follow correct I...

Page 31: ...Rev1 0 REV 1 0 34 2900 0207 5 29 P a g e Figure 4 8 Optional Modbus RS 232 RS 485 interface Board 4 2 1 Modbus Register and Function Code Summary The following table identifies TXP C20 Modbus register locations and function codes ...

Page 32: ...e as Version X 100 D2A Chan 1 31001 4 NA D2A Chan 2 31002 4 NA 10 bit value representing the D2A value of 0 to 1023 after all cal features are applied A2D Raw Chan 1 31003 4 NA A2D Raw Chan 2 31004 4 NA 10 bit value representing the A2D value of 0 to 1023 for 25 to 103 FS 197 0 1003 100 Chan 1 Status 31005 4 NA Chan 2 Status 31006 4 NA 16 bit status word bit assignment for each channel ALARM1_BELO...

Page 33: ...1_ALM1 BIT0 CHAN1_ALM2 BIT1 CHAN1_ALM3 BIT2 CHAN2_ALM1 BIT3 CHAN2_ALM2 BIT4 CHAN2_ALM3 BIT5 Disc Relay Status 31012 4 NA 16 bit status word bit assignment for system status CHAN_1ALM_1 BIT0 CHAN_1ALM_2 BIT1 CHAN_1ALM_3 BIT2 CHAN_2ALM_1 BIT3 CHAN_2ALM_2 BIT4 CHAN_2ALM_3 BIT5 RELAY_1 BIT6 RELAY_2 BIT7 PIEZO BIT7 Memory Floating Point Notes Returned as 15 bit 2s complement with 5 over under range app...

Page 34: ... NA Chan 2 Alarm 2 Real 41017 3 NA Chan 2 Alarm 2 Devisor 41018 3 NA Chan 2 Alarm 3 Real 41019 3 NA Chan 2 Alarm 3 Devisor 41020 3 NA Binary Cal Data 41021 3 NA Chan 1 A2D MIN 41022 3 NA Chan 1 A2D MAX 41023 3 NA Chan 1 D2A MIN 41024 3 NA Chan 1 D2A MAX 41025 3 NA Chan 2 A2D MIN 41026 3 NA Chan 2 A2D MAX 41027 3 NA Chan 2 D2A MIN 41028 3 NA Chan 2 D2A MAX Min and Max calibration points for the A D...

Page 35: ...24VDC 50 Watt Power Supplies Some applications may require 24VDC power in excess of the 12 watts supplied by the TXP C20 NEC Class 2 FIFTY WATT external supplies are available for Division 1 and Division 2 potentially hazardous area installations and both also include a NEMA 4X weather rating ...

Page 36: ...ic enclosures are not grounded by metal conduit For internal ground points to be grounded to earth the TB5 GND terminal must have a proper earth ground connection CAUTION Nonmetallic ENCLOSURE DOES NOT PROVIDE GROUNDING BETWEEN CONDUIT CONNECTIONS USE GROUNDING TYPE BUSHINGS AND JUMPER WIRES ALL FIELD WIRING MUST HAVE INSULATION SUITABLE FOR AT LEAST 250V Figure 5 1 N4 NEMA 3X Enclosure ...

Page 37: ... 34 2900 0207 5 35 P a g e 5 1 TXP C20 XP NEMA 7 Explosion Proof Wall Mount Enclosure The TXP C20 XP shown in Figure 5 2 is an aluminum NEMA 7 wall mount enclosure designed for mounting into potentially hazardous Figure 5 2 XP NEMA 7X Enclosure ...

Page 38: ...n metallic enclosures are not grounded by metal conduit For internal ground points to be grounded to earth the TB5 GND terminal must have a proper earth ground connection CAUTION NONMETALLIC ENCLOSURE DOES NOT PROVIDE GROUNDING BETWEEN CONDUIT CONNECTIONS USE GROUNDING TYPE BUSHINGS AND JUMPER WIRES ALL FIELD WIRING MUST HAVE INSULATION SUITABLE FOR AT LEAST 250V Figure 5 3 PY NEMA 4X Enclosure ...

Page 39: ...4 2900 0207 5 37 P a g e 5 3 TXP C20 PCS NEMA 4 Painted Steel Wall Mount Enclosure The TXP C20 PCS shown in Figure 5 4 is a Painted Carbon Steel NEMA 4 wall mount enclosure designed for non corrosive installations Figure 5 4 PCS NEMA 4 Enclosure ...

Page 40: ... 34 2900 0207 5 38 P a g e 5 4 TXP C20 SS NEMA 4X Stainless Steel Wall Mount Enclosure The TXP C20 SS shown in Figure 5 5 is a 316 Stainless Steel NEMA 4X wall mount enclosure designed for corrosive installations Figure 5 5 SS NEMA 4X Enclosure ...

Page 41: ...ues Screen 17 Figure 3 11 Horn Piezo Screen 18 Figure 3 12 Communications Screen 18 Figure 3 14 Clock Delays Screen 19 Figure 3 13 Diagnostics Screen 19 Figure 3 15 Input Min Max Screen 20 Figure 3 16 System Security Screen 20 Figure 4 1 Motherboard Power Connection 21 Figure 4 2 Motherboard 22 Figure 4 3 Optional Analog Input Board 23 Figure 4 4 Optional Bridge EC Sensor Input Board 24 Figure 4 5...

Page 42: ...TXP C20_Instruction_Manual_ Rev1 0 REV 1 0 34 2900 0207 5 40 P a g e Figure 5 4 PCS NEMA 4 Enclosure 37 Figure 5 5 SS NEMA 4X Enclosure 38 ...

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Page 44: ...OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE ARE LIMITED TO A PERIOD OF TWO 2 YEARS FROM THE PURCHASE DATE Macurco shall not be liable for any incidental or consequential damages for breach of this or any other warranty express or implied arising out of or related to the use of said gas detector The manufacturer or its agent s liability shall be limited to replacement or repair as set for...

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