Configuring The M-Bus Modem On The Pc (Mod002) - Relay MOD002 Handbuch

The following connections are situated at the front of the modem:
RS232:
OH P W R
Power:
R
S
M-Bus
Modem 2
3
2
Power
FGND
GND
Line analog: RJ45 socket for connection to analoge phone network
V+
A suitable phone cable RJ45 / RJ12 with TAE (Germany) adaptor is
Line
an alog
included with delivery.

3. Configuring the M-Bus Modem on the PC (MOD002)

Two M-Bus modems are required to configure a simple M-Bus data communications link:
one for the PC and one for the level converter (RS-232C → M-Bus) on the bus.
The RS-232C interface of the PC M-Bus modem is connected to the computer port with a 9-
pole 1:1 cable (accessories). When the power supply unit has been inserted the power LED
and some other LEDs should shine.
The configuration of the modem as an M-Bus modem is explained below. This configuration
can be stored in the modem EEPROM with the AT&W0&W1 command, so that if the
operating voltage is disconnected or if the modem receives an ATZ command it returns to
the M-Bus mode.
Configuration Steps for the M-Bus Modem (PC)
• Start terminal program (for example TELIX, HYPERTERM, ZOC) and select a COM port,
any data format and baud rate (for example 9600,8,N,1).
• Enter AT<CR> (modem should detect baud rate; if no entry echo appears on the screen,
enter next command line blindly).
• Enter AT&F<CR> (initialize modem with factory profile).
• ATU1<CR> (user command to set the M-Bus mode). Note: Both lines may also be
combined to AT&FU1<CR>.
• AT&W0&W1<CR> (store configuration permanently in the modem EEPROM).
M-Bus - MODEM
GmbH, Stettiner Str. 38, D-33106 Paderborn
DSUB-9F connector for RS-232C serial interface
DC plug-in connector for 9–35VDC power
Plug-in power supply 12VDC in scope of delivery
Optional accessory: rail power supply NT013
FGND: for optional shielding
GND: GND of power supply (black wire)
V+: Plus of power supply (black-white wire)
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