Contemporary Control Systems EISC Configurable Switches Installation Guide - Manual (Page 4)

TD021000-0IF
4
Powering
The EISC requires low-voltage power — AC or DC — via a removable
keyed four-pin connector which accepts 16–18 AWG conductors.
Consult the specifications for power requirements. Power options are
explained below.
NOTE: This device is intended for use with Class 2 circuits.
DC Powered
The EISC accepts a voltage range of 10–36 VDC and draws a maximum
current value commensurate with 12-watt power consumption. Power
conductors should be sized accordingly. Ground is directly connected to
zero volts and the equipment chassis is isolated from zero volts. The DC
voltage input connections are reverse-polarity protected.
Figure 2 — DC Powered
Redundant DC Powered
Redundant diode-isolated DC power input terminals are provided so that
the user can connect redundant power to the unit for operating despite the
loss of primary power. Both sources must provide 12 watts of power.
Figure 3 — Redundant DC Powered