D20A Analog Input Peripheral; D20S Digital Input Peripheral; D20K Control Output Peripheral - GE D20 Installation And Operation Manual

D20/D200
Installation and Operations Guide
Familiarization
, continued
D20A Analog The D20A peripheral is a 32-point analog input interface module for the D20.
Input
The D20A WESDAC logic module plugs directly into a D20A WESTERM
Peripheral
termination panel, which provides three screw compression type terminals for each
input (+, -, shield) and sockets for analog scaling networks. DB25 and barrier strip
termination options are also available. Provision is made for configuring analog loop
supply from the D20A or externally. Loop voltage is fused and can be monitored.
An on/off-line indication is passed to the D20/D200, where it can be used as a
pseudo status.
D20S Digital The D20S can accept up to 64 digital inputs.
Input
The WESDAC D20S logic module plugs directly into a WESTERM D20S
Peripheral
termination panel equipped with screw compression type terminals for field
terminations. DB25 and barrier strip termination options are also available.
The D20S termination panel is jumper-configurable for contact wetting supplied
from the D20S or an external source. Wetting voltage is fused and monitored.
An on/off-line indication is passed to the D20/D200, where it can be used as a
pseudo status.
D20K Control The D20K is a 32-point control output interface module for the D20. It supports up
Output 32 trip/close pairs, 32 individual controls and/or 16 raise/lower pairs.
Peripheral
The D20K logic module plugs directly into a D20K termination panel, which is
equipped with screw compression type field terminations. DB25 and barrier strip
termination options are also available.
A Local/Remote switch and control output fusing are also provided. The
Local/Remote switch is a manually operated switch used to disable D20K relay coil
power during maintenance. An on/off-line indication is passed to the D20/D200,
where it can be used as a pseudo status. Fuse protection complete with monitoring of
fuse status is provided for control output power supplied from an internal source.
Interposing relays can be supplied using D20KI panels.
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