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Chapter 1. General
REAR PANEL FEATURES
The OCU 45 rear panel provides electrical and optical interface connections,
normally-open and normally-closed alarm relay contacts, and a 48V power
connection (see Figure 1-2).
The electrical interface connector is provided using dual 75 Ohm BNC female
connectors (one for transmit and one for receive). The optical interface of the
OCU 45 consists of a standard SC or ST receptacle using two fibers, one for
each direction of transmission.
External alarm contacts for critical and non-critical alarms are provided on the
rear panel of the OCU 45 using a standard 4-pin terminal block containing
NORMALLY OPEN, NORMALLY CLOSED, COMMON, and GROUND
connections. The DC power supply connector is a standard 3-pin terminal
block containing -48V, RETURN, and GROUND. For more information on
the above connections, please refer to Installation on page 2-21.
Figure 1-2. OCU 45 Rear Panel
61200664L1-1B
OCU 45 User Manual
19
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