Input Module - 1 Transformer Board; Figure 14: Rear Serial Port Terminals; Figure 15: Input Module - 1 Transformer Board - GE MiCOM P40 Agile Technical Manual

P14x Chapter 3 - Hardware Design

Figure 14: Rear serial port terminals

An additional serial port with D-type presentation is available as an optional board, if required.
6.5

INPUT MODULE - 1 TRANSFORMER BOARD

Figure 15: Input module - 1 transformer board

The input module consists of the main input board 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.
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