Analog Loop Driver
The Model XLD-1 from Siemens Building Technolo-
gies, Inc. is an optional MXL network module that
connects XL3 analog addressable devices to the
MXL System. The module uses four consecutive
network addresses on the System. Devices
connected to the XLD-1 circuits are supervised by
the MXL Control Panel.
Each of the XLD-1 circuits supports up to 30
alarm causing, trouble causing, and supervisory
type devices, as well as intelligent output de-
vices. Each device has its own address. The
sensitivity of any analog smoke detector is
checked and adjusted from the Control Panel.
Sensitivity, as well as other device information, is
displayed at the Control Panel. The XLD-1 also
supports the use of relay bases.
Each XLD-1 circuit can be wired in either a Class B
or Class A configuration. When using Class B, T-
tapping is permitted with no loss of supervision.
The XLD-1 module has an on-board micro-
processor which provides it with the ability to
function and to initiate alarm conditions even if the
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Florham Park, New Jersey 07932
MXL main processor fails. The module also has
four LEDS, which can indicate alarm, trouble,
transmit, or ground fault. (Refer to Figure 1.)
For additional information on the MXL/MXLV
System, refer to the MXL/MXLV Manual, P/N
Remove all system power before installa-
tion, first battery and then AC. (To power up,
connect the AC first and then the battery.)
The XLD-1 installs into the MXL optional MOM-4
card cage where it plugs into one full width slot.
The XLD-1 can be installed in either of the full
width slots of the MOM-4 (See Figure 2). The slot
determines whether the device loops are avail-
able on TB1 or TB2 of the MOM-4.
Before installing the XLD-1 in the MOM-4, set the
network address using switch S1 (Refer to Figure
1 for the location of S1). Set it to the lowest of the
four corresponding addresses selected for it in the
CSG-M. (The lowest address may be odd or
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Brampton, Ontario L6T 5E4 Canada