D20C Combination I/O Peripheral; D20C Daughter Boards; Table: D20C Options; D20Ac Analog Input Peripheral - GE D20 Installation And Operation Manual

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Familiarization
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D20C The D20C is a combination I/O module that is used for small-point-count
Combination applications. The D20C can be configured with:
I/O Peripheral
• 16 digital inputs
• 8 momentary or dual function trip/close control outputs
• 16 analog inputs
• 8 analog inputs and 8 analog outputs.
The D20C performs all the I/O processes similar to the other D20 I/O modules, but
uses a faster clock speed to meet the increased processing power demand.
Interposing relays may be supplied using a WESTERM D20KI, as with the D20K.
A Local/Remote switch is provided to turn off relay coil power, and put the module
off-line. An on/off-line indication is sent to the D20/D200, which is available to the
host as a pseudo-status.
D20C Daughter D20C1 and D20C2 daughter boards are available as options for the D20C peripheral.
Boards They are mounted on the D20C WESDAC to give additional analog inputs and
analog outputs, as shown below:
Table: D20C
Options
D20C
D20C with D20C1 Daughter Board
D20C with D20C2 Daughter Board
D20AC Analog The D20AC peripheral, which is the alternating current analog input module for the
Input D20 product line, provides:
Peripheral
•
Up to six 50/60Hz voltage inputs
•
Up to nine 50/60Hz current inputs
•
One DC input
To provide isolation, the termination panel uses current and potential transformers on
the AC inputs, and an isolation transformer on the DC input. The current inputs
utilize a compressor to achieve an eight-times reduction of the input signal. The AC
current and voltage inputs, and the DC input are buffered before being multiplexed
into the analog-to-digital (A/D) converter section.
General
Full
WESDAC Board
Installation and Operations Guide
Digital Digital
Inputs Outputs
16 8
16 8
16 8
994-0078-2.00-7
D20/D200
Analog Analog
Inputs Outputs
16
8 8
31