Power-Limited Guidelines
Make sure these guidelines are accounted for before wiring for power-limited systems:
• Non-power limited field wiring (AC power, batteries, City connection) must be installed and routed in the shaded areas shown in Figure 15.
• Power-limited field wiring must be installed and routed in the non-shaded areas shown in Figure 15, with the exception of City wiring.
• Excess slack should be kept to a minimum inside the back box enclosure. The wiring should be neatly dressed and bundled together using the
wire ties provided with the equipment. Anchor power-limited wiring to tie points, as shown in Figure 15.
Figure 15: Power-Limited Wiring
• Tie the wiring located between bays to the internal wiring troughs, if applicable.
• When powering remote units or switching power through relay contacts, power for these circuits must be provided by one of the following in
order to wire them as power-limited circuits.
- MSS, MSS2, ESS (4010ES), UPS, XPS, or RPS-style power supply (in legacy 4100 systems).
- The 4100-1108 Power Supply (8 A).
- ES-PS (EPS in legacy 4100 systems).
- A power-limited power supply that is listed for fire-protective signaling use.
- A power-limited power supply that is listed for fire-protective signaling use.
• Auxiliary power only: In order to connect a circuit using power-limited wiring, the devices being powered must all be addressable, or a UL Listed
EOL relay must be used to supervise the circuit. Refer to the figure below for wiring directions for the EOL relay.
page 18 579-220 Rev. F
4100/4120- Series and 4010ES Relay Modules Installation Instructions
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