Echelon SmartServer 2.2 Hardware - Manual (Page 24)

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, install the
antenna at least 1m away from the SmartServer and its associated wiring. In addition, 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
must 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 required 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 .
Connecting Legacy or Non native Devices to the RS-232 and RS-485
Serial Ports
You can connect legacy systems or non native networks such as BACnet (requires a custom driver,
sold separately) and CAN (requires an external interface, sold separately) to the SmartServer’s RS-232
12 Assembling the SmartServer Hardware