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Page 10
MRX-1 B
ASE
S
TATION
Integrating RS-232 and Relays
RS-232
There are two versions of the RS232 cable. The RS232M has a male
DB9 connector and the RS232F has a female DB9 connector. Be
sure to verify the proper cable configuration by visually inspecting
the RS232 terminal on the device to be controlled. Some devices
will use other types of connectors such as RJ45 and mini jacks.
Custom cables can be made using the pin-out for the MRX-1 jacks.
Please refer to the devices’ owner’s manual for the pin-out of RS232
Terminals that are not DB9 connectors. (Universal Remote Control
Part #’s: RS232M-male DB9 and RS232F-female DB9). Polarity
(RS232): Tip = no connection, Ring 1 =TX (red wire), ring 2 = RX
(white wire), ring 3=GND (shield).
1. Connect the 3.5 mono 4-circuit mini plug end of a URC RS232
Male or Female to the appropriate RS232 programmable output
jack of the MRX-1 Network Base station.
2. Connect the DB9 Connector to the device RS232 Terminal.
Tighten the thumb screws to secure the connection.
Once the connections have been made, the RS232 device proper-
ties need configuring before RS-232 communication can be estab-
lished. The Baud Rate, Data bits, Parity and Stop Bit is supplied in
the manufacturer’s manual and must be entered into CCP. Once all
the information has been supplied, each of the entered RS-232
commands can be tested to ensure communication and accuracy.
1. Within CCP, double click on MRX-1 within the House Designer
Tree.
2. Double-click on MRX-1 in the House Designer tree.
3. An image of the MRX-1 appears in the middle window.