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Chapter 6 4100ES SPS Field Wiring
SPS Auxiliary Relay Wiring
Guidelines The SPS includes one on-board, programmable relay.
• All wiring must be between 18 AWG and 12 AWG.
• When power through auxiliary contacts provided by the SPS, wiring is power-limited.
• When power through auxiliary contacts is not provided by the SPS, use an in-line fuse
(208-165). If the power source is not power-limited to the requirements of UL864, wiring
is to be segregated to the non-power-limited spaces of the cabinet.
• The relay circuit is not supervised.
• The relay circuit is rated to switch 2 A at 30 VAC or 30 VDC, resistive load.
• Relay contacts are Form C dry contacts. Suppression is provided to Earth. Do not switch
voltages greater than rating, or damage may result.
Wiring Figure 6-9 shows SPS auxiliary relay wiring.
Figure 6-9. Auxiliary Relay Wiring
B+ B- A+A- B+ B- A+ A- B+ B- A+A-
SPS
TB2
TB4
12 AWG to 18AWG
Dedicated auxiliary
relay terminal block
NORMALLY
CLOSED
COMMON
NORMALLY
OPEN
NO C NC
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