Owner's Manual
ALD-2I Analog Loop Driver
ENGINEER AND ARCHITECT SPECIFICATIONS
5036
CATALOG NUMBER
Description
The ALD-2I is an MXL Network option module that sup-
plies two intelligent analog circuits utilizing Cerberus
Pyrotronics “I” series type intelligent devices. It occupies
two addresses on the Network and, through the use of a
unique communications protocol, devices connected to
the ALD-2I circuits are dynamically supervised by the MXL
Control Panel. Smoke detectors are monitored for sensitiv-
ity and notification is given when the sensitivity is outside
normal parameters. Each of the ALD-2I circuits supports
the use of up to 60 alarm, trouble, security, status and
supervisory type devices as well as remote conventional
initiating device zone modules (CZM-1) and intelligent
output devices (TRI-60R, ICP). Sensitivity of any smoke
detector can be queried and adjusted from the control
panel. Sensitivity as well as other device information can
be displayed and printed at the control panel. The ALD-2I
supports the use of relay bases and audible bases (inde-
pendently controllable).
To provide analog loop short circuit isolation, the LIM-1
module can be used to prevent a single short from
interrupting loop device communication.
Each ALD-2I circuit can be wired in either a Style 4 (Class
B) or Style 6 (Class A) configuration. When using the Style
4 method, T-Tapping is permitted with no loss of supervi-
sion.
The ALD-2I has an on board microprocessor that provides
it with the ability to function in a degrade mode and initiate
alarm conditions even if the MXL main microprocessor
fails.
l Dynamic Supervision
l 2 Intelligent Analog Device Circuits
l Remote Smoke Detector Sensitivity, Voltage
Read-out/Printout
l Device Identification
l 32 Character Custom Alphanumeric Message
Per Device
l Accepts Remote Conventional Zone Modules
(CZM-1)
l Alarm, Trouble, Supervisory, Security and Status
Reporting
l Supports Audible Bases
l Short Circuit Isolation with LIM-1
l On Board Microprocessor
l Isolated Power Supply
l Power Limited Per NEC 760
l Programmable Input/Output Module
l 60 Intelligent Devices Per Circuit
l Remote Smoke Detector Sensitivity Adjustment
l Independent Control of Detector Relays (Up to
60 per Circuit)
l Intelligent Contact Monitoring Devices
l Supports T-Tap Wiring
l Style 4 (Class B) or Style 6 (Class A) Wiring
l Degrade Mode
l On-Board Ground Fault Detection
l Listed, ULC Listed, FM, CSFM, NYMEA,
and City of Chicago Approved
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