Contemporary Control Systems EIDX Managed Automation Switches Installation Guide for Non-PoE Models - Manual (Page 6)

TD071105-0IA
6
Powering
The EIDX requires low-voltage AC or DC power via a four-pin removable keyed
connector. Power conductors can be stranded (16–18 AWG) or solid (16–22
AWG). Consult the Specifications section for power requirements. The various
power options are explained below.
NOTE: This device is intended for use with Class 2 circuits.
DC Powered
The EIDX accepts a voltage of 24 VDC ±5% and draws current commensurate
with power consumption. Power conductors should be sized accordingly. COM
and the equipment chassis are isolated from zero volts. The input connections are
reverse-polarity protected.
Figure 4 — DC Powered Figure 5 — Redundant DC Powered
Redundant DC Powered
Redundant diode-isolated DC power inputs are provided so the EIDX can operate
despite the loss of primary power. Both sources must provide required power.
AC Powered
The EIDX accepts a voltage of 24 VAC ±5% and draws current commensurate
with power consumption.
Figure 6 — AC Powered Figure 7 — AC Powered
with Grounded Secondary
AC Powered with Battery Backup
The EIDX can also operate in the AC
mode with a backup battery providing
power if the AC source fails. The EIDX
does NOT charge the battery, so separate
provisions are required for charging.
Figure 8 — AC Powered with
Battery Backup