Serial Interface Circuit - Faraday MPC-6000 Installation, Operation And Maintenance Manual

MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL

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.
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).
Addressable
Device Circuit
IN
OUT
Do Not Use
Auxiliary Power
Circuit
49
Serial Interface Circuit
(+, -) 0.4A max.
24VDC nominal, filtered (31VDC 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
RDC-3, P/N 315-049700FA (if applicable)
SLU-2, P/N 315-447345
SRU-2, P/N 315-447344