Multitech MultiModem DSVD MT5600DSVD Instruction Manual download pdf (Page 21)

i.LON SmartServer 2.0 Hardware Guide 11

The following table lists the enclosure markings for the RS-232 and RS-485 port screw terminals and

on the SmartServer and their connection types.

Screw Terminal Enclosure Marking EIA-232/RS-485 Connection

21 RTS RS-232 RTS

22 CTS RS-232 CTS

23 RXD RS-232 Receive

24 TXD RS-232 Transmit

25 GND RS-232 ground/RS-485 ground (as needed)

26 Shield GND RS-485 cable shield

27 RT- RS-485 (-)

28 RT+ RS-485 (+)

Connecting an External GSM Modem to the RS-232 Serial Port

You can connect an external GSM modem to your SmartServer using the RS-232 serial port. To do

this, you need to order a special cable from EBV Elektronik (part number ECH-RS232/500). For more

information, go to the EBV Web site at

www.ebv.com. The serial connector from the modem must be

attached to the RS-232 ports on the SmartServer as specified in the following table.

External GSM

Modem DB 9 Pin

Screw Terminal Enclosure Marking

1 NC N/A

2 23 RXD

3 24 TXD

4 NC N/A

5 25 GND

6 NC N/A

7 21 RTS

8 22 CTS

9 NC N/A

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 34 35

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Multitech MultiModem DSVD MT5600DSVD Instruction Manual Page 21