Multitech MultiModem DSVD MT5600DSVD Instruction Manual download pdf (Page 22)

12 Assembling the SmartServer Hardware

Notes: If your external GSM modem requires a carrier detect line, you can attach one end of a

22-gauge (AWG) stranded wire to the carrier detect port on your modem, and then connect the other

end of the wire to pin 1 of the RS-232 console port on the SmartServer.

If you are connecting an external GSM modem that uses a wireless antenna to your SmartServer, you

must install the modem at least 1m away from the SmartServer.

If you are attaching an external GSM modem with a separate antenna to your SmartServer, you should

install the antenna at least 1m away from the SmartServer and its associated wiring. In addition, you

should install the antennas of high-powered modems (1 Watt or greater) outside the housing of any

enclosure.

Connecting a Multi-Tech MTCBA-G-F4 Modem to the RS-232 Serial Port

You can connect a Multi-Tech MultiModem

GPRS external wireless modem (model number

MTCBA-G-F4) to your SmartServer. For more information on this modem, go to the Multi-Tech

Systems site at

www.multitech.com. To view the user’s guide for the MTCBA-G-F4 modem, go to

www.multitech.com/DOCUMENTS/Collateral/manuals/S000443A.pdf .

The serial connector from the modem must be attached to the RS-232 ports on the SmartServer as

specified in the following table.

MTCBA-G-F4

Modem DB 15 Pin

Screw Terminal Enclosure Marking

2 24 TXD

6 23 RXD

8, 12 21 RTS

9 25 GND

11 22 CTS

Note: The MTCBA-G-F4 modem uses a wireless antenna; therefore, you must install the modem at

least 1m away from the SmartServer.

Connecting M-Bus Devices to the RS-232 Serial Port

You can connect M-Bus devices to your SmartServer using the RS-232 serial port. To do this, you

need to connect a level converter between the RS-232 port of the SmartServer and the M-Bus devices.

This converts the M-Bus signals to RS-232 signals and supplies the M-Bus devices with power

(similar to the LPT-11 Link Power Transceiver).

The class of level converter you should order depends on the number of M-Bus devices you are

connecting to the SmartServer. You can order level converters that can drive anywhere from 3 to 250

devices. For more information and examples of these level converters, go to the following Web sites:

•

www.relay.de (Level Converter PW3, PW20, PW60)

•

www.stv-automation.de (BIALON MPW-20 M-Bus)

•

www.hydrometer.de (HYDRO-CENTER 25, 60, 250)

For more information on the M-Bus, refer to the M-Bus User Group at

www.m-bus.com.

Connecting Modbus Devices to the RS-232 and RS-485 Serial Ports

You can connect Modbus devices to the SmartServer using the RS-232 and RS-485 serial ports. For

more information on the Modbus protocol, go to

www.modbus.org.

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