Honeywell Morley IAS 795072100 loop driver PCB module with pin header connectors

Honeywell Morley IAS 795072100 Loop Driver Card 460mA

KTI07001001MELC

Product Description

The Honeywell 795-072-100 is an analogue addressable loop driver plug-in card designed to provide communication and power for Morley-IAS protocol detection circuits on ZX series fire alarm control panels.

Make/Brand: Honeywell
Model: 795-072-100
Continuous Loop Drive Current: 460 mA maximum (440 mA continuous nominal per loop)
Operating Loop Voltage: 24 V DC nominal
Card Quiescent Consumption: 20 mA (excluding loop devices)
Loop Device Capacity: Up to 198 addressable points (99 detectors/sensors and 99 modules per loop)
Supported Wiring Topologies: Class A (closed loop return) and Class B (open spur)
Maximum Loop Resistance: 40 Ohms
Maximum Loop Capacitance: 0.5 µF
Onboard Features: Double address detection diagnostic circuitry
Panel Compatibility: Honeywell Morley-IAS ZXSe series (ZX1Se, ZX2Se, ZX5Se) and legacy ZX multi-protocol panels
Form Factor: Direct plug-in PCB daughterboard module
Compliance: Designed to meet EN 54-2 and EN 54-4 standards in ZXSe panel enclosures

KTI07001001MELC

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Product Details
Available Brands	Honeywell
Unit	Numbers
HSN Code	85311020
Weight	0.032 kg
Dimension	L 9 x W 5.4 x H 1.8 cm cm ft in m
Warranty	12 Months Warranty
Resources	Download Datasheet
Tags/categories	Safety Fire Safety Solutions Fire Alarm System Addressable Fire Alarm System

Usually dispatched within 5 days

About this product .

The Honeywell Morley-IAS 795-072-100 is an analogue addressable loop driver expansion module manufactured as a populated printed circuit board assembly. Measuring 90 mm by 54 mm by 18 mm with an approximate net weight of 32 g, it mounts internally as a daughterboard onto designated expansion slots within ZX series panel enclosures via robust pin header connections.
Designed specifically to drive circuits using the Morley-IAS protocol, this card supplies a nominal 24 V DC operating loop voltage and supports a maximum continuous drive current of 460 mA. The module operates with a quiescent power draw of 20 mA and accommodates demanding site cabling with up to 40 Ohms line circuit resistance and 0.5 µF maximum circuit capacitance.
Each loop driver card manages up to 198 addressable field devices, split evenly across 99 detector addresses and 99 module addresses. Built-in double address detection circuitry automatically flags duplicate device addressing during commissioning to prevent signal collision or undetected field device states.
The module is fully compatible with Honeywell Morley-IAS ZXSe control panels, supporting 1 loop on the ZX1Se, up to 2 loops on the ZX2Se, and up to 5 loops on the ZX5Se, as well as legacy ZX multi-protocol panels. It supports both Class A return loop and Class B spur wiring topologies across optical smoke detectors, thermal heat sensors, monitor modules, control relays, and zone interface modules.
Constructed in strict accordance with European fire life safety standards, the driver card complies with EN 54-2 (Control and Indicating Equipment) and EN 54-4 (Power Supply Equipment) requirements when operated within certified ZXSe series control panels.
Commissioning is streamlined using the host control panel AUTOLEARN routine, which automatically identifies and maps all connected loop devices. Prior to energizing the system or connecting backup batteries, ensure the panel loop voltage jumper is verified for the correct driver card position.

Product Information .

Hospitals, Clinics Shopping Malls, Showrooms Government Buildings, Offices Banks Airports Railways, Bus Stations Conference Rooms Auditorium Conference Hall Production Floors Construction Sites

Control Panel and System Compatibility for Honeywell Morley-IAS 795-072-100

The Honeywell Morley-IAS 795-072-100 loop driver card is an analogue addressable plug-in daughterboard engineered specifically to provide communication and drive current for Morley-IAS protocol field devices. When integrating this module into industrial and commercial fire detection networks, compatibility across control panel hardware, protocol rules, field devices, and loop wiring parameters must be strictly aligned with manufacturer engineering criteria.

Control Panel Hardware Compatibility

The 795-072-100 module is designed for direct plug-in mounting onto designated loop driver pin headers inside Honeywell Morley-IAS intelligent multi-protocol fire alarm control panels. It is compatible with both the ZX series and the ZXSe series platforms:

Morley-IAS ZX1Se: Supports a single loop driver card, accommodating 1 detection loop with a maximum drive current of 460 mA.
Morley-IAS ZX2Se: Accommodates 1 or 2 loop driver cards, enabling up to 2 individual detection loops at up to 460 mA per loop.
Morley-IAS ZX5Se: Scales from 1 to 5 loop driver cards, providing up to 5 individual detection loops at up to 460 mA per loop.
Morley-IAS ZX Series: Fully backward-compatible with legacy ZX series multi-protocol chassis accepting internal plug-in loop driver boards.

Protocol Assignment Rules

The ZXSe and ZX series architectures support multiple industry protocols (including Morley-IAS, Apollo, Hochiki ESP, and System Sensor). However, strict protocol isolation rules govern hardware deployment:

Single Chassis Homogeneity: Multiple sensor protocols cannot be operated simultaneously within the same panel enclosure. All loop driver cards installed within a single ZXSe or ZX chassis must communicate using the exact same device protocol. Therefore, if the 795-072-100 is deployed, every installed loop card in that specific panel enclosure must run the Morley-IAS protocol.
Networked Protocol Independence: While an individual panel cannot mix protocols across its internal loops, distinct control panels connected across a multi-panel network can run differing protocols independently without communication conflict.

Field Device Compatibility and Loop Addressing Limits

Each 795-072-100 loop driver card provides an addressable line capacity of up to 198 individual address points, structured into two dedicated address bands:

Up to 99 analogue addressable detector and sensor addresses.
Up to 99 addressable module addresses (such as monitor modules, control modules, isolator modules, and conventional zone interface modules).

The card permits mixed device topologies on a common signaling circuit, driving optical smoke detectors, thermal heat sensors, interface units, and loop-powered indicators on the same physical loop line. Onboard double address detection automatically identifies duplicate device addresses during commissioning to protect loop data integrity.

Circuit Architecture and Electrical Wiring Limits

To maintain signal integrity and meet compliance with EN 54-2 and EN 54-4 standards, field wiring connected to the 795-072-100 driver must adhere to the following electrical and topological constraints:

Parameter	Specification / Compatibility Limit
Loop Wiring Topology	Class A (closed return loop) or Class B (open spur) configurations
Nominal Loop Voltage	24 V DC
Maximum Continuous Loop Drive Current	460 mA per loop (nominal 440 mA continuous)
Card Quiescent Consumption	20 mA (excluding connected field devices)
Maximum Loop Wiring Resistance	40 Ohms maximum
Maximum Loop Wiring Capacitance	0.5 µF maximum

Prior to applying main or standby battery power (batteries are not included), the loop voltage jumper on the panel/card interface must be set to the correct operating position for the installed 795-072-100 driver card to ensure correct electrical regulation across connected Morley-IAS devices.

Honeywell Morley-IAS 795-072-100 Loop Driver Card Installation & Commissioning Guide

Mechanical Mounting and Motherboard Integration

The Honeywell Morley-IAS 795-072-100 is engineered as a compact plug-in daughterboard module measuring 90 mm x 54 mm x 18 mm (H x W x D) with a net weight of approximately 32 g. It installs directly inside the main control panel enclosure of compatible Honeywell Morley-IAS ZXSe and legacy ZX series fire alarm control panels. Physical attachment is achieved via direct plug-in pin headers that mate securely into dedicated loop driver card expansion slots on the panel motherboard.

Before seating the card, ensure that all mains supply and secondary standby battery (they are not included) power sources to the control panel are completely disconnected. Align the board header pins carefully with the chassis socket to avoid bent pins, applying firm, even pressure until the daughterboard is fully seated against the motherboard interface.

Loop Voltage Jumper Configuration and Power Requirements

Prior to re-energizing the panel cabinet, engineers must inspect and verify the physical loop voltage jumper on the panel/card interface. The jumper must be configured to the designated voltage setting corresponding to the Morley-IAS driver type. Failure to position this jumper correctly before applying primary power or standby battery (they are not included) power can disrupt loop signaling or prevent device discovery.

The card operates at a nominal loop voltage of 24 V DC and exhibits an internal quiescent power consumption of 20 mA (excluding connected field devices). It delivers a nominal continuous drive current of 440 mA with a maximum loop load threshold of 460 mA. When planning the loop load, system integrators must aggregate the active and quiescent consumption of all sensors, modules, and notification appliances to ensure current draw does not exceed 460 mA, which would trigger loop supply fault trips.

Field Loop Wiring, Topologies, and Circuit Limits

The 795-072-100 driver card supports both Class A (closed return loop) and Class B (radial/open spur) circuit topologies. Connected field circuits must adhere to strict transmission parameter limits to ensure uninterrupted communication and signal integrity across all field devices:

Maximum Loop Line Resistance: 40 Ohms total circuit resistance.
Maximum Loop Capacitance: 0.5 µF total line capacitance.
Device Capacity: Up to 99 analogue addressable detector/sensor addresses and 99 monitor/control module addresses (maximum 198 total addressable points per loop).
Supported Mixed Topologies: Morley-IAS optical smoke sensors, thermal heat sensors, monitor modules, control modules, fault isolators, and conventional zone interface modules.

Protocol Uniformity and Enclosure Constraints

Panel architecture requires protocol uniformity across each individual control panel enclosure. Multiple sensor communication protocols cannot be operated simultaneously within the same panel chassis; therefore, every loop driver card installed within a specific ZXSe cabinet must communicate using identical field device protocols. Differing protocols are supported across independent panels communicating over a shared multi-panel network.

Control Panel Model	Maximum Supported Loop Cards	Drive Capability per Loop
Honeywell Morley-IAS ZX1Se	1 Loop Driver Card	460 mA maximum
Honeywell Morley-IAS ZX2Se	Up to 2 Loop Driver Cards	460 mA per loop
Honeywell Morley-IAS ZX5Se	Up to 5 Loop Driver Cards	460 mA per loop
Legacy Morley-IAS ZX Series	Per chassis card slot configuration	460 mA per loop

System Commissioning, AUTOLEARN, and Diagnostics

Once mechanical installation and wiring termination are verified, initial loop commissioning is facilitated using the integrated ZXSe control panel AUTOLEARN routine. This internal supervisory routine scans the detection loop, automatically interrogating, identifying, and cataloging every active sensor, interface module, and peripheral device connected to the 795-072-100 driver.

The module incorporates built-in double address detection circuitry to flag field installation errors where two peripheral devices share an identical rotary or digital address. Environmental operating temperatures for the card must remain within 0°C to +49°C with non-condensing relative humidity between 10% and 93% (subject to the host panel enclosure limit of 0°C to +40°C and 85% RH). When integrated into Morley-IAS ZXSe systems, the installation satisfies design and functional compliance under EN 54-2 and EN 54-4 standards.

Honeywell Morley-IAS 795-072-100 Loop Driver Card Troubleshooting Guide

The Honeywell Morley-IAS 795-072-100 analogue addressable loop driver plug-in card is engineered to drive field devices on Morley-IAS protocol loops within ZXSe (ZX1Se, ZX2Se, ZX5Se) and ZX series fire alarm control panels. Commissioning issues, loop communication dropouts, and circuit fault indications typically stem from wiring impedance thresholds, configuration jumpers, current limitations, or addressing conflicts. Systematic troubleshooting ensures compliant operation in accordance with EN 54-2 and EN 54-4 standards.

Double Address Detection and Addressing Faults

The 795-072-100 features built-in double address detection to identify and report duplicate address configurations across the detection loop. Each card supports up to 99 analogue addressable detector or sensor addresses and up to 99 module addresses, providing a maximum of 198 individual addressable points per loop. If two detectors or two modules share identical address settings on the Morley-IAS communication circuit, the panel reports a double address fault.

Symptom: The panel reports a duplicate device or double address fault on the specified loop.
Resolution: Verify the physical rotary switch or DIP switch settings on field detectors and modules. Confirm that sensors (optical smoke or thermal heat detectors) are addressed from 1 to 99 and monitor/control/zone modules are independently addressed from 1 to 99 without overlapping IDs within the same device type category.

Loop Impedance: Exceeding Resistance and Capacitance Limits

Field cabling characteristics are critical for error-free Morley-IAS protocol communication at 24 V DC nominal loop operating voltage. Exceeding electrical boundary specifications causes signal distortion, polling errors, and missing device faults.

Loop Circuit Resistance: The maximum allowable loop line circuit resistance is 40 Ohms. High line resistance results in voltage drop across long cable runs, preventing peripheral devices and remote modules from receiving adequate operating voltage.
Loop Circuit Capacitance: The maximum allowable loop cable capacitance is 0.5 µF. Elevated capacitance causes high-frequency signal attenuation and rounded communication pulses, triggering intermittent device dropouts.
Resolution: Measure end-to-end loop resistance and core-to-core/core-to-screen capacitance with field devices disconnected. Split long wiring runs or replace non-compliant cable if parameters exceed 40 Ohms or 0.5 µF. Verify continuity across Class A return loops or termination integrity on Class B spurs.

Loop Overload and Power Supply Trips

The 795-072-100 provides a continuous loop drive current limit of 460 mA maximum (with a nominal continuous drive current rating of 440 mA per loop). The loop card itself consumes 20 mA quiescent current (excluding loop devices).

Symptom: The panel indicates a loop power supply fault, loop current limit trip, or cyclical device reset behavior.
Resolution: Perform a total circuit current audit. Sum the active and quiescent currents of all connected optical smoke detectors, heat detectors, control modules, monitor modules, isolator modules, and loop-powered sounders. If the calculated or measured load approaches or exceeds 460 mA, reallocate devices across additional 795-072-100 loop cards on available panel slots (up to 2 loops on ZX2Se or up to 5 loops on ZX5Se).

Hardware Setup and Protocol Conflicts

Proper mechanical daughterboard seating and configuration must be verified prior to energizing the panel.

Loop Voltage Jumper Position: The loop voltage jumper on the panel/card interface must be verified and set to the correct operating position for the installed driver type prior to applying main power or standby batteries (they are not included). Incorrect jumper placement may cause failure of the loop to initialize.
Mixed Protocol Incompatibility: Multiple sensor protocols cannot be run simultaneously within the same panel enclosure. All installed loop cards inside a single ZXSe or ZX chassis must communicate with identical protocol devices. A 795-072-100 Morley-IAS driver card cannot operate alongside cards driving differing protocols within the same panel cabinet, although distinct protocols can coexist on separate network-connected panels.
Seating Inspection: Ensure the 90 mm x 54 mm x 18 mm card is securely seated into the designated plug-in daughterboard pin headers on the control panel motherboard while the system is powered down.

AUTOLEARN Diagnostic Routine

When commissioning new devices or tracing missing nodes, use the ZXSe control panel's internal AUTOLEARN routine. This routine automatically polls and registers all connected Morley-IAS protocol field devices. Devices that fail to register during AUTOLEARN indicate localized wiring breaks, open circuits in Class A loops, shorted isolators, or address values exceeding the 99 sensor / 99 module allocation threshold.

Honeywell Morley-IAS 795-072-100 Loop Driver Card Applications & Integration

Capacity Expansion for Morley-IAS ZXSe and ZX Fire Alarm Panels

The Honeywell Morley-IAS 795-072-100 loop driver card is primarily deployed to expand detection loop capacity across modular analogue addressable fire alarm control panels. System integrators and panel builders utilize this plug-in daughterboard to scale Morley-IAS ZX2Se panels from a single loop to two loops, as well as expanding Morley-IAS ZX5Se panels up to five distinct loops. Because the card mounts internally onto dedicated slots on the control panel motherboard using direct plug-in pin headers, fire alarm technicians can expand coverage across commercial buildings, production facilities, and distribution centers without replacing the primary enclosure or main control hardware.

Panel architecture mandates that all loop driver cards installed within an individual ZXSe panel chassis run the identical Morley-IAS protocol. However, across networked multi-panel fire safety installations, separate panels running Morley-IAS loop drivers can interconnect seamlessly with panels utilizing other supported protocols.

High-Density Addressable Detection and Interface Topologies

Engineers deploy the 795-072-100 driver card to manage complex, mixed-device detection topologies on a single physical circuit. Each loop card controls up to 198 total addresses, partitioned into a capacity of up to 99 analogue addressable detector/sensor addresses alongside up to 99 module addresses. This architecture is designed for facilities that require varied peripheral types operating on the same circuit loop:

Analogue Sensors: Morley-IAS optical smoke sensors and thermal heat sensors distributed through occupied areas, processing rooms, and technical spaces.
Input and Supervisory Modules: Addressable monitor modules connected to third-party equipment such as sprinkler flow switches, pump status monitors, and gas detection interfaces.
Output and Control Modules: Output control modules configured to trigger fire damper closure, ventilation shutoff, air handling units, and auxiliary relay functions during an alarm event.
Circuit Protection and Legacy Interfaces: Loop isolator modules to provide sectional circuit isolation, as well as conventional zone interface modules allowing legacy conventional detector zones to be integrated directly onto the Morley-IAS addressable loop.

Class A Fault-Tolerant and Class B Wiring Configurations

The 795-072-100 loop driver card accommodates both Class A (closed return loop) and Class B (open spur) field wiring topologies. In critical infrastructure or large commercial premises where cable integrity and continuous device polling are mandated even in the event of an open circuit fault, the Class A closed return configuration is installed. For localized or branch applications, Class B spur circuits are supported.

Field engineers must calibrate electrical loads to ensure that total active and quiescent demands remain within the card's continuous rating. The card delivers a maximum continuous loop drive current of 460 mA (nominal 440 mA continuous drive current per loop) at a nominal 24 V DC operating loop voltage, while drawing an internal quiescent power consumption of 20 mA (excluding connected field devices). Circuit planning must maintain loop line resistance within 40 Ohms maximum and overall cable capacitance within 0.5 µF maximum to avoid polling delays, communication drops, or supply fault conditions.

Commissioning, Diagnostics, and Field Upgrades

During initial site installation and system recommissioning, technicians rely on panel-level diagnostic capabilities enabled by the loop card. The card supports the ZXSe panel AUTOLEARN routine, an automated internal diagnostic function that interrogates the loop circuit to scan, detect, and address all connected field sensors and modules. Furthermore, the 795-072-100 features integrated double address detection, which alerts technicians when two devices on the loop have been set to the same physical address, preventing silent device drops and configuration oversights.

During installation or card replacement in operating panels, the onboard loop voltage jumper must be aligned to the required driver position before energizing the control equipment with main AC supply or standby battery power (they are not included). This configuration maintains compliance with EN 54-2 and EN 54-4 system standards across the fire alarm network.

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