GE P642 User Manual

Figure 15: Rear serial port terminals
An additional serial por
t with D-type presentation is available as an optional board, if required.
6.5 INPUT MODULE - 1 TRANSFORMER BOARD
Figure 16: Input module - 1 transformer board
The input module consists of the main input boar
d coupled together with an instrument transformer board. The
instrument transformer board contains the voltage and current transformers, which isolate and scale the
analogue input signals delivered by the system transformers. The input board contains the A/D conversion and
digital processing circuitry, as well as eight digital isolated inputs (opto-inputs).
The boards are connected together physically and electrically. The module is encased in a metal housing for
shielding against electromagnetic interference.
Chapter 3 - Hardware Design P64x
46 P64x-TM-EN-1.3

GE P642 Specifications

General

Brand	GE
Model	P642
Category	Relays
Language	English