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IMPORTANT: Before you proceed with cabling, you must know whether the devices to which you will connect the Model 24SII DES are DTE (Data Terminal Equipment) or DCE (Data Communication Equipment). The following devices are generally DTE: terminals, printers, computers like the IBM PC. The following devices are DCE: modems and some computers.

The M24SII-V05 and M24SII-V06A I/O modules have RJ-45 modular connectors. Most serial computers, modems, and printers do not have RJ-45 modular connectors. Therefore, adapters are required to convert from either DB-25 or DE-9 connectors to modular connectors. BayTech has a complete line of RJ-45 adapters and cables that will make your installation quick and trouble free. Please see Appendix A.5 for adapter pin outs as well as recommended cabling.

The M24SII-V05 and M24SII-V06A I/O modules use the following signals for communication:

RJ-45 PIN-OUT INFORMATION

PIN

SIGNAL

DIRECTION

DESCRIPTION

 

EIA-232

 

 

 

 

 

 

 

 

 

 

1

DTR

Output

Handshake Out, enable/disable the receiving of

 

 

 

characters

 

 

 

 

2

GND

----

Signal Ground

 

 

 

 

3

RTS

Output

Handshake Out, Normally +10V

 

 

 

 

4

TX

Output

Transmit Data

 

 

 

 

5

RX

Input

Receive Data

 

 

 

 

6

DSR

Input

Handshake In, not used

 

 

 

 

7

GND

----

Signal Ground

 

 

 

 

8

CTS

Input

Handshake In, enable/disable the transmission of

 

 

 

characters

 

 

 

 

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