Installation Instructions

1
OPERATION
The MXL from Siemens Industry, Inc., reports system
conditions to a Central Station using the Silent Knight
Model 5128/5129, a four channel digital communica-
tor that reports alarm, trouble, supervisory, and
miscellaneous status. When used with the MXL, the
Silent Knight Model 5128/5129 uses the alarm,
trouble, and supervisory channels.
The miscellaneous
status channel may be used to annunciate conditions other
than fire at the Central Station.
ELECTRICAL RATINGS
Installation Instructions
Silent Knight Model 5128/5129
Digital Fire Communicator Connected to the
MXL Control Panel
Appendix for the MXL Manual
Electrical
The MXL Control Panel connects to the Silent
Knight Model 5128/5129 Digital Fire Communicator
using the Alarm, Trouble, and Supervisory dry
contacts on the MXL Main Board (See Figure 1).
Refer to the Silent Knight 5128/5129 Fire Slave
Communicator Installation Manual, P/N 150805,
provided with the Silent Knight Model 5128/5129 for
dialer instructions.
The Silent Knight Model 5128/5129 monitors all
System troubles through the MXL trouble relay. The
MXL delays the AC fail trouble signal in accordance
with NFPA and UL requirements.
In NFPA 72 Remote Station install batteries to
provide 60 hour standby capacity. For signalling
service DACT wire according to the Figure 1.
In NFPA 72 Central Station connections AC fail
reporting is delayed. The delay is typically 6 hours
(25% of 24 hours). Only the reporting of the trouble
is delayed.
AC power must be present for a full minute before
the system switches back to AC power from the
battery.
Using the optional AC monitor input (See Figure 1),
the Silent Knight Model 5128/5129 monitors AC fail
trouble. When the MXL System reports an AC fail
trouble, the Silent Knight Model 5128/5129 sends a
specific code to the Central Station that identifies the
trouble as AC fail.
Refer to the MXL/MXLV Manual, P/N 315-092036
for MXL System information.
P/N 315-093294-7
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario
L6T 5E4 Canada
INSTALLATION
Remove all system power before installation,
first battery and then AC. (To power up,
connect the AC first and then the battery.)
Mounting
Silent Knight Model 5128
Mount the Silent Knight Model 5128 within the MXL
enclosure. Alternate mounting for the Silent Knight
5128 may include double-sided tape, velcro, or
snaptrack.
Silent Knight Model 5129
The Silent Knight Model 5129 must be mounted
adjacent to the MXL Control Panel and within 20 feet
of it using electrical conduit.
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