Siemens MLC Installation Instructions Manual page 2

Controls and Indicators
Siemens Industry, Inc.
Building Technologies Division
The on-board microprocessor provides the MLC with the ability to function and
initiate alarm conditions even if the PMI/PMI-2/PMI-3 (XLS), FCM2041-U2 (Desigo
Fire Safety Modular), FCM2041-U3 (Cerberus PRO Modular) fails.
The front panel of the MLC contains one reset switch, 9 LEDs, and three HNET
address switches, as shown in Figure 1. Pushing the reset switch re-initializes the
MLC operation.
The MLC must be re-initialized by pushing the module Reset switch any time the
24VDC supply is interrupted.
The LED functions are defined as follows:
POWER
CARD FAIL
HNET FAIL
ALARM
TROUBLE
MAIN CIRCUITS TROUBLE
MAIN CIRCUITS GND FAULT
EXPANSION CIRCUITS TROUBLE
EXPANSION CIRCUITS GND FAULT (Yellow)
(Green) Normally ON. When illuminated,
indicates the power for the MLC is
applied to the card.
(Yellow) Normally OFF . When illuminated,
indicates hardware failure on the
card or unsuccessful firmware
upload. During firmware upload, this
LED should blink.
(Yellow) Normally OFF . When illuminated,
indicates that the HNET communica-
tion with the MLC has terminated.
(Red) Normally OFF . When illuminated,
indicates that the MLC has detected
an alarm.
(Yellow) Normally OFF . When illuminated,
indicates that a trouble is present on
the MLC that is not related to its
field wiring or slave ALD driver.
(Yellow) Normally OFF . When illuminated,
indicates that the MLC has detected
a wiring trouble (fault) on device loop
1 or 2.
(Yellow) Normally OFF . When illuminated,
indicates that the MLC has detected
a ground fault on device loop 1 or 2
field wiring.
(Yellow) Normally OFF . Not used at this time.
Normally OFF . Not used at this time.
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