D20A Analog Input Peripheral - GE D20 Technical Overview

D20/D200 Technical Overview
GE Part Number
517-0219
517-0327
517-0330
517-0331
517-0262
517-0241
517-0249
517-0266

2.4.7 D20A Analog Input Peripheral

The D20A Analog Input Peripheral, illustrated above, is a 32-point analog input interface
module. The D20A, which is capable of processing standard voltage and current inputs
continuously, has the following features:
• Programmable Input Ranges: A programmable gain instrument amplifier permits
programming of voltage input ranges. Ranges are stored in RAM on a per-point basis. (+/- 1,
+/-5, +/- 10 V scale).
• Variable Scan Rate: Programmable scan rate from 17.2 to 20.5 ms (50/60 Hz) on a per
module basis.
• 32 Differential Analog Inputs and eight internal references using synchronous integrating-
type analog-to-digital (A/D) converters
• A/D Conversion provides excellent normal-mode rejection characteristics while maintaining
very good response times (approximately 550 ms total).
The D20A logic module plugs directly into a D20A termination panel, which provides three
screw compression type terminals for each input (+, -, shield) and sockets for analog scaling
networks. Provision is made for configuring analog loop supplies from the D20A power source,
or externally. Loop voltage is fused.
48
D20SX 64 channel digital input termination board with separable compression blocks.
D20SB 64 channel input termination board with barrier strips.
D20SDI 24V, 64 channel digital input termination board with DB25 connectors
D20SDI 48V, 64 channel digital input termination board with DB25 connectors
D20SDI 125V, 64 channel digital input termination board with DB25 connectors
D20SZ 48V, 64 channel digital input, high voltage termination board with compression
blocks.
D20SZ 110V, 64 channel digital input, high voltage termination board with
compression blocks.
D20SZ 220V, 64 channel digital input, high voltage termination board with
compression blocks.
Figure 30 D20A Analog Input Peripheral
PRPI-019-3.00-10
Description
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