Wiring Guidelines

Proper wiring of the RMC and of the system is important for proper machine control. Poor wiring is a common source of noisy feedback, drive signals or digital I/O. Follow the guidelines in this topic and the other wiring topics to ensure a low-noise system.

Specific Wiring Instructions

Each RMC module has specific wiring diagrams. Follow the links below for wiring details:

RMC75 Wiring

RMC150 Wiring

RMC200 Wiring

General Wiring Instructions

For CE compliance and to minimize electrical interference:

Use twisted pairs for all wiring where possible.
Use shielded cables for all wiring.
Keep RMC wiring separate from AC mains or conductors carrying high currents, especially high frequency switching power such as conductors between servo drives and motors or amplifiers and proportional valves.

For UL and CUL compliance:

RMC75/RMC150: Power supply must be Class 2.
RMC75/RMC150: All RMC inputs and outputs must be connected to Class 2 circuits only.

Fusing

No fusing is required if a Class 2 power supply is used, as required by UL. Class 2 power supplies are limited to 100W output. This provides sufficient protection for the RMC and no additional fusing is required.

For Class I, Division 2 compliance (only available for RMC150E with the Class I, Division 2 designation)

The RMC150E USB port is intended for configuration, programming, and troubleshooting purposes only. Do not leave it connected during normal machine operation, as it is sensitive to electrical noise.
Conductors must be copper only.

Terminal Block Wires and Clamp Screw Torque

Tighten the wire clamp screws on the terminal blocks to:

Controller	Module	AWG	Torque
RMC75	all modules	26-12	7 lb-in (0.8 Nm)
RMC150	RMC150E, MDT (M), SSI (S), ANLG (H), ANLG INPUTS (A), ANLG2 (G), RES (R)	26-12	4.5 lb-in (0.51 Nm)
RMC150	RMC150E DI/O, UI/O	28-16	2.2 lb-in (0.25 Nm)
RMC200	PS4D, PS6D	24-12	n/a (spring connector)
RMC200	CPU40L (DI/O), CPU20L (power input and DI/O), A8, S8, LC8, Q4, CA4, CV8, D24, U14	24-16	n/a (spring connector)

Using Spring-Cage Connectors (RMC200)

Spring-cage connectors may be used for stranded wire or stranded wire with ferrules. Wire ferrules provide easy insertion. Recommended wire ferrule spec are as follows:

	PS4D, PS6D	CPU20L, CPU40, CA4, CV8, S8, A8, Q4, D24, U14
Wire Gauge, stranded	24 -12 AWG 0.2mm2 - 1.5mm2	24 -16 AWG 0.2mm2 - 1.5mm2
Wire Gauge, ferrule no plastic sleeve	0.25mm2 - 2.5mm2	0.25mm2 - 1.5mm2
Wire Gauge, ferrule with plastic sleeve	0.25mm2 - 2.5mm2	0.25mm2 - 0.75mm2
Stripped length	10mm	10mm
Ferrule Length	10mm - 12mm	10mm - 12mm

Inserting stranded wire:

Press and hold the spring clamp actuator.
Insert wire.
Release spring clamp actuator.

Inserting wire with ferrule:

Insert wire (may require some force).

Removing wire (stranded or ferrule):

Press and hold the spring-cage actuator.
Remove wire.
Release spring-cage actuator.