Delta RMC151 - Manual (Page 1170)

RMC70/150 and RMCTools User Manual
10.3.5. RMC150 SSI Wiring
This topic covers the wiring of the SSI inputs on the RMC150 SSI (S) module. For the Control
Output (Drive) wiring, see the RMC150 Control Output (Drive) Wiring topic. For wiring SSI
inputs on the Universal I/O Module, see the RMC150 UI/O Wiring.
Use shielded twisted pairs for all connections to inputs and outputs. Route the transducer
wiring separate from other wiring. You must provide the power supplies needed by your
transducers. See Wiring Guidelines for general wiring information.
Wire clamp screws must be tightened to max 4.5 lb-in (0.51 Nm).
Maximum SSI Cable Length
SSI Clock Rate Maximum Cable Length*
230 kHz 850 ft (255 m)
921 kHz 120 ft (37 m)
* The cable lengths are approximate, and may be affected by the type of wire and
transducer.
Wiring Diagram
Note:
The SSI input Cmn pin must be connected! A disconnected Cmn pin can cause noise
and inaccurate readings.
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