MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
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Serial Interface Circuit
The serial interface circuit can address up to 16 standard annunciators and/or 8 remote
processors to drive graphic annunciation or relay modules. Devices on the circuit may be
connected up to 4000 feet from the control unit. At the top of the main board the terminal
blocks are used for the connection of remote serial devices.
IN
OUT
Addressable
Device Circuit
Circuit
Auxiliary Power
Do Not Use
•
Remote Device Power - When connecting devices on the serial interface circuit, a limited
amount of current is available from the control unit. If more current supply is required for the
connected devices, auxiliary power must be provided. Each address on the circuit must be
fully powered from either control unit or auxiliary power (
no combined source can be
configured
).
Serial Interface Circuit,
(+, -) 24VDC nominal, 0.4 max
(X+, X-) RS-485 levels
Wire Type-Twisted Pair For Data
Wire Resistance-11 ohms/line (4000’ max)
Supervised, Power Limited.
See the following Installation Instructions
for Compatible Devices:
RDC-2, P/N 315-049103FA
SLU-2, P/N 315-447345
SRU-2, P/N 315-447344
