IF 632 Installation and Operation Manual
Release: 3 01/31/01
58
Relay Module
The relay modules (RM-4, RM-8) consists of three (3) assemblies. The
I/O Relay
Module
, the
Relay Expander
, and the
Control Display
.
Relay Circuit
Module
The relay module consists of four (4) form "C" 10 amp fused relay contacts. The
module also provides four (4) feedback input points (switched negative) using 3.9K
ohm resistors in parallel with an open feedback contact. If the feedback points are
connected the LED's on the control display will follow the status of the feedback input
point. A (-) connected directly to the feedback point will actuate the Red LED and a
(-) through the 3.9k resistor will actuate the Green LED. Otherwise the LED's on the
display will follow the status of the relay. Programming jumper (S1) is provided on
each board for setting the vertical position/address of the card (S1-1 through S1-4).
The relay module uses the lower terminal block and cables to the bus driver module.
Each position on the Module bus can accommodate an expanded relay module.
Relay
Expander
Module
The relay expander provides the addition of four (4) supplementary form "C" 10 amp
fused relay contacts. The module also provides four (4) feedback input points
(switched negative) using 3.9K ohm resistors in parallel with an open feedback
contact. If the feedback points are connected (when the system is initialized) the
LED's on the control display will follow the status of the feedback input point.
Otherwise the LED's on the display will follow the status of the relay. The relay
expander module uses the upper terminal block and cables to the I/O relay module.
Relay Display
Module
The control display module provides eight (8) red relay activated LED's, eight (8)
green relay normal LED's. Eight (8) circuit tactile switches are provided for
programming
and
Bypass
functions. Card slots are furnished for relay descriptions
and comments. The display module connects (via the display bus) to the bus driver
module. The physical location of the display is set by the addressing jumper S1.
Ensure addressing jumper is set according to its physical location in the cabinet and
matches associated I/O module address jumper setting. Refer to Figure I-1, Cabinet
Module Locations.
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