Specifications

SQ: 6-32
RS3: Service Quick Reference Guide
ControlFiles
Controller Processor:
MLC 1984--1439--000x.............................................
1984--1249--000x..................................................
SSC 1984--1442--000x.............................................
1984--1371--000x..................................................
MUX and PLC 1984--1494--000x....................................
LEDs and Test Points
LED
Meaning and Response
12 V Fuse Blown
(DS10)
Replace Fuse F1 (Supplies --12 VDC to the card).
+12 V Fuse Blown
(DS9)
Replace Fuse F2 (Supplies +12 VDC to the card).
Block Evaluation
(DS8)
The microprocessor is evaluating an input or output block. With
redundant MultiLoop processors, this LED indicates which one is
active.
CP Access
(DS7)
The Coordinator Processor is accessing the MultiLoop Processor
RAM Memory and transferring configuration and dynamic data to
the NV Memory. If the MultiLoop Processor loses memory, current
data is quickly reloaded from nonvolatile memory.
Interrupt
(DS6)
The M ultiLoop Processor is resetting its watchdog timer to prevent
timing out or to acknowledge a synchronizing clock pulse.
5VFuseBlown
(DS3)
Replace Fuse F4 (Supplies 5 VDC to the MultiLoop Processor).
Card Fault
(DS2)
A fault has been detected on the MultiLoop Processor or the
ENABLE/DISABLE Switch is in the disable position. If the switch is
enabled and this LED is on, replace the MultiLoop Processor.
Card Enable
(DS1)
The ENABLE/DISABLE Switch is enabled and no hardware faults
are detected on the MultiLoop Processor.
Test Point Function
Yellow +5 V (± 0.1 V)
Red +12 V (± 0.1 V)
Brown Ground Return