Contemporary Control Systems AI-FR Redundant Fibre Hubs - Manual (Page 3)

INSTALLATION
AI-FR hubs are intended to be panel mounted in an industrial enclosure or
wiring closet with two #8 pan head screws (not provided). Optionally, a
DIN rail mount can be used by purchasing a DIN rail mounting kit.
Electromagnetic Compliance
This equipment is intended for nonresidential use. Operation in a residential
area is likely to generate electrical interference unless corrective measures
are undertaken by the user.
Powering
AI-FR hubs require either low voltage AC or DC power via a four-pin
removable keyed connector. Consult the specifications for power
requirements. The various power options are explained below.
DC Powered
AI-FR hubs accept a voltage range of 10–36 VDC and draw a current value
commensurate with 4-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 input connections are
reverse-polarity protected.
Figure 1 — DC Powered
Redundant DC Powered
Redundant diode-isolated DC power inputs are provided so the AI-FR can
operate despite the loss of primary power. Either source must provide
4 watts, but the currents drawn from the two supplies may differ.
TD675300-0ID
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Figure 2 — Redundant DC Powered