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VT-MODEM-1 Power, Phone Line Connections:

DC Power Wiring

Connect 10 - 30 VDC to the VT-MODEM-1 as shown in Figure 4-2. The modem can usually be powered
from the same DC source as other devices in the enclosure. All the screw terminals should be tightened to a
maximum of 3.48 in-lbs.

Telephone Cable

Connect analog phone lines to the RJ-11 jacks as appropriate. One RJ-11 jack is provided to connect directly
to a telephone (optional) and the second RJ-11 jack functions as the connection to the telephone network.

Figure 4-2: VT-MODEM-1 WIRING

VT-MODEM User Manual

Page 8 of 30

Last Revised: 17-Aug-09

Sixnet Technology Park



331 Ushers Road



Clifton Park, NY 12065 USA



+1 (518) 877-5173



[email protected]

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Содержание VT-MODEM

Страница 1: ...T Command Summary 18 Section 7 S Register Summary 21 Section 8 Maintenance Information 23 Section 9 Product Support Other Documents 24 This manual applies to the following products General purpose industrial modem VT MODEM 1 Self dialing industrial modem VT MODEM 2 RS485 industrial modem VT MODEM 3 VT MODEM User Manual Page 1 of 30 Last Revised 17 Aug 09 Sixnet Technology Park 331 Ushers Road Clif...

Страница 2: ... convenient and easy installation adjacent to other DIN rail components inside of new or existing enclosures Most Windows software can communicate through a VT MODEM to remote devices to perform file transfers diagnostics program debugging and many other operations All Sixnet Industrial Modems allow communication to remote sites for data retrieval or diagnostics Note All VT MODEM models communicat...

Страница 3: ...the tables below to see how to interpret this number 3 You can also detect the modem type using HyperTerminal To query the firmware version enter ati3 enter Please see the tables below for information on how to interpret this firmware rev number VT MODEM 1 VT MODEM Wizard Rev 1 Rev 2 Rev 3 Back Label 1 00 1 08 1 10 2 02 1 09 3 00 and above HyperTerminal ati3 V2 100 V34_2M_DLS P2109 V90 CX81802 V34...

Страница 4: ...e polled by that computer as if the computer had initiated the call When the modem connects to the central computer it identifies itself so the computer can run the appropriate I O driver and interrogate the PLC SENDING A MESSAGE BASED UPON A SWITCH CONTACT Locations that do not have PLCs or other intelligence can originate calls to alert you to low tank levels over temperature conditions or other...

Страница 5: ...established a connection to the modem and is ready RD Receive Data Flashes as data is received from the phone line TD Transmit Data Flashes as data is sent out the phone line Power On when power is present General Characteristics All models Input Power 10 30 VDC VT MODEM 1 2 10 52 VDC VT MODEM 3 Input Current Rev 1 and Rev2 see section 1 65mA 24VDC and 26mA in Low Power mode of 1 typical 97mA 24VD...

Страница 6: ...device it will be connected to Figure 3 1 VT MODEM DIMENSIONS ALL MODELS For DIN rail mounting hook the top rear of the modem onto the top edge of the DIN rail Using a small flat head screwdriver pull down on the spring loaded tab on the bottom of the modem and push the modem back against the rail Reverse these steps to remove the modem See Figure 3 2 below Figure 3 2 DIN RAIL MOUNTING VT MODEM Us...

Страница 7: ...ice PC Gateway or VersaTRAK to a DCE device VT MODEM For IPm and ST GT 1210 stations use a straight through Ethernet cable not supplied and the RJ45 to DB9 male adapter that came with the station Cable requirements for PLCs and other devices may be different Refer to the PLC or other device s documentation for cable pinouts Some PLC cables are documented in the Technical notes provided on the Sixn...

Страница 8: ...tened to a maximum of 3 48 in lbs Telephone Cable Connect analog phone lines to the RJ 11 jacks as appropriate One RJ 11 jack is provided to connect directly to a telephone optional and the second RJ 11 jack functions as the connection to the telephone network Figure 4 2 VT MODEM 1 WIRING VT MODEM User Manual Page 8 of 30 Last Revised 17 Aug 09 Sixnet Technology Park 331 Ushers Road Clifton Park N...

Страница 9: ...hone network PLC Self Dial I O Connections Connect a 10 30VDC signal to the From PLC trigger input terminal An OFF to ON transition of this signal starts the auto dialing sequence The modem will call and remain connected while the signal is ON When the signal goes false the modem will terminate the connection or the call in progress The To PLC on line output terminal will go ON ON user supplied VD...

Страница 10: ...Figure 4 4 for typical wiring configurations Fabricate a cable to connect the modem s RS422 RS485 port to the field device s The VT MODEM 3 has DIP switches These switches establish the mode of operation for the RS422 RS485 port Set these switches to match the type of wiring connected to the RS422 RS485 port Refer to Figure 4 5 on the next page It is not necessary to cycle power to the modem if DI...

Страница 11: ...5 Detailed RS422 RS485 Wiring and DIP Switch Settings VT MODEM User Manual Page 11 of 30 Last Revised 17 Aug 09 Sixnet Technology Park 331 Ushers Road Clifton Park NY 12065 USA 1 518 877 5173 support sixnet com ...

Страница 12: ...ould be one pair of bias resistors acting upon the transmit receive wires On an RS485 four wire network there should be two pairs of bias resistors one pair on the receive wires and one pair on the transmit wires Bias resistors force the receive or transmit receive wires to a known non floating state when none of the RS485 devices are transmitting data If bias resistors are not present some RS485 ...

Страница 13: ... change your PC s modem settings when communicating with a VT MODEM 3 running in RS422 or RS485 mode The PC modem VT MODEM 3 and the modem to modem speed should all be set to the same rate VT MODEM User Manual Page 13 of 30 Last Revised 17 Aug 09 Sixnet Technology Park 331 Ushers Road Clifton Park NY 12065 USA 1 518 877 5173 support sixnet com ...

Страница 14: ...cable VT CABLE MDM or equivalent between the VT MODEM and the PC Turn on the PC During the boot up process Windows should detect the modem and display the New Hardware Found dialog box 2 Make the selection Select from a list of alternative drivers 3 The Select Device dialog will be displayed In the column labeled Manufacturers select Standard Modem Types In the column labeled Models select Standar...

Страница 15: ...en double click the Phone and Modems Options icon 2 Go to the Modems tab and click the Add button to install a new modem The Install New Modem wizard will appear Select the Don t detect my modem I will select it from a list 3 Highlight the manufacturers list Standard Modem Types From the models list select Standard 28800 bps Modem then click Next 4 Select the COM Port on your computer the modem wi...

Страница 16: ...ds through its serial port at any supported baud rate However if the modem is connected to a device that does not send commands or data unless spoken to such as most PLCs then the modem will pass information from the phone line to its serial port at the last auto detected baud rate This is typically the baud rate used by the VT MODEM setup Wizard when configuring the modem The VT MODEM is defaulte...

Страница 17: ...em speed in the VT MODEM Setup Wizard to a lower value to restrict the phone line speed Remember to load the new configuration to the modem VT MODEM Profile Summary Here is a summary of the active configuration user profile 0 user profile 1 and the factory defaults when the modem is shipped Each time the modem is powered up first the factory default settings as listed in Section 6 are loaded into ...

Страница 18: ...e details of these differences Command Function A Re execute Last Command do not precede with AT command and do not follow with a carriage return A Go off hook and Answer A Call AT x Write value x to last selected register AT Report the value of last selected register Bn Set data standard to CCITT Europe et al or Bell Mode U S Canada for connections at 300 or 1200 bps Cn Carrier Control parameter ...

Страница 19: ...irect normal reliable or auto reliable Vn Single Line Connect Message Enable An Select Max MNP Block Size Bn Transmit Break to Remote sets the length of break signal sent to remote modem in non error correction mode MS Select Modulation allows control of the modulation the modem uses to negotiate a connection VDR Enable disable distinctive ring GCI Country Select A8E V 8 and V 8bis Operation Contr...

Страница 20: ...Caller ID VCID Enabling and configuring parameters of Caller ID detection Synchronous Access Mode ES Enable Disable Synchronous Access Mode in the client or central site modem ESA Configures the Operation of the Synchronous Access Submode ITF Selects Transmit Flow Control Thresholds Fax Commands FCLASS Select Active Service Class FAA Auto answer enable FAE Auto answer enable FTS Stop transmission ...

Страница 21: ...quence before receipt of any other character for the escape sequence to be recognized 0 255 0 02s 50 S13 Reserved S14 General bit mapped options indicates the status of the following options echo quiet mode results codes tone pulse and originate answer 138 8Ah S15 Reserved S16 Test mode bit mapped options T 0 S17 Reserved S20 AutoSync HDLC Addr or BSC Sync Char 0 255 0 S21 V24 general bit mapped o...

Страница 22: ...isconnect and the actual disconnect operation 0 255 s 20 S39 Flow control bit mapped options 3 S40 General bit mapped options 104 68h S41 General bit mapped options 195 C3h S42 S45 Reserved S46 Enable Disable Data Compression 138 S48 V 42 Negotiation Control 7 S82 LAPM Break Control 128 40h S86 Call Failure Reason Code when the No Carrier result code is issued the reason for the failure is written...

Страница 23: ...lf dial is in process or that the modem is in Configure Self dialing Parameters mode Note The RD and TD LEDs indicate the flow of characters in and out of the phone line interface of the VT MODEM and are not directly connected to the RS232 port all models or RS422 RS485 port VT MODEM 3 Reconnecting Serial Cables It is important to cycle remove and then reapply DC power to a VT MODEM each time the ...

Страница 24: ... for sale for a minimum of five years so you can design your system only once and be assured of continued supply and high quality after sale service We further promise to plan each product improvement and new feature to be upward compatible with existing designs and installations using the latest modem wizard to configure the modem Our goal is to make each new product release better than the one i...

Страница 25: ...odify Sixnet software at the request of a customer will obligate Sixnet in any way This limited warranty does not cover losses or damages which occur in shipment to or from Buyer or due to improper installation maintenance misuse neglect or any cause other than ordinary commercial or industrial applications In particular Sixnet makes no warranties whatsoever with respect to implied warranties of m...

Страница 26: ...be billed if the repair is covered under warranty Please supply us with as many details about the problem as you can The information you supply will be written on the RMA form and supplied to the repair department before your unit arrives This helps us to provide you with the best service in the fastest manner Normally repairs are completed in two days Sometimes difficult problems take a little lo...

Страница 27: ...plains the procedure for interfacing a Sixnet Industrial Telephone Modem with an AB MicroLogix 1500 controller and a computer running the Rockwell RSLogix 500 programming software and the RSLINX communication software This setup will allow a remote computer to go on line with a MicroLogix via a telephone modem connection TN 641 GE Versamax Micro PLC This document explains the procedure of dialing ...

Страница 28: ...tibility or use of this device the telephone company is required to give adequate notice of the changes If the telephone company requests information on what equipment is connected to their lines inform them of A The telephone number that it is connected to B The Ringer Equivalence Number 0 3 C The USOC jack required RJ11 and D The FCC Registration Number 34579 MD E Items b and d are indicated on ...

Страница 29: ...rements The VT MODEM meets the procedural and specification requirements for certification under the Terminal Attachment Program CERTIFICATION NO 2991 8926 A ISSUED TO Sixnet TYPE OF EQUIPMENT MULTI MEDIA DEVICE TRADE NAME AND MODEL VT MODEM 1 VT MODEM 2 VT MODEM 3 METHOD OF CONNECTION CA11A RINGER EQUIVALENCE NO 0 3 CERTIFIED TO SPECIFICATION CS03 ISSUE 8 NETWORK INTERFACE LS ...

Страница 30: ...ic environment this product may cause radio interference in which case the user may be required to take adequate action Germany Diese VT MODEM 1 2 and 3 EC als Endeinrichtung vorgesehen und muss an ein TAE mit F Kodierung angeschlossen werden This VT MODEM 1 2 and 3 EC is a terminal equipment which must be connected to the PSTN using an F coded connector plug IEC950 1991 The Industrial Modem shall...

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