Lucent Technologies -48V CPS4000/CPS4000 PLUS Cabinet Power System
7 - 20 Alarms, Controls, and Displays Issue 13 December 2000
Datalogger Outputs
Overview The ES646, ES646B, and ES648 control units send two analog voltages
to the office alarm connector for monitoring the plant voltage and
current remotely. The primary voltage equals the measured voltage
multiplied by 25. There is a 31.6K ohm in series with each lead to form
a Class 2 circuit. The voltage measured between R_VI (J3-26) and
R_RTN (J3-27) is proportional to the plant load current. This voltage
multiplied by 25 equals the load current.
Each CPS4000 PLUS shelf also has the means to monitor the output
current of the secondary output through the use of connector J15,
located on the right-hand side of the shelf. The voltage at J15 is
proportional to 1mV per ampere of secondary output current. The
contacts on connector J15 are protected against accidental short-circuit
to frame ground and will automatically recover.
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