13 COMMUNICATIONS OPTIONS
13.1 Entry Level Versions
RTK 725B annunciators supplied with Entry Level Comm’s are provided with the following basic
communications protocols:-
Communications Addresses
Each card in the system requires a unique address therefore the first card in any given system
is address 1, the second card address 2 etc.
Protocols
• Modbus RTU - Modbus Function 01 and Modbus Function 15 only.
• RTK AMS
NOTE:
On RTK 725B annunciators supplied with Entry Level Comm’s, after 30th September
2009, Modbus will be order specific and will only be available on alarm cards using
software version SO9158.
Communication Speed
The user is able to select the baud rate to communicate to 3rd party devices using the drop
menu within the configuration software as detailed in Section 13 under the comm’s tab. The
following baud rates are available as required 38,400, 19,200 or 9,600
Connection Details
An Industry standard RJ11 connector is provided on the XS/FC485 communication card which
provides the following connections:-
1. TXa
2. No Connection
3. OV
4. RXb
5. TXb
6. RXa
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