The Morley-IAS by Honeywell RS485 Communication Module (Part Number: 795-004-001, KT Reference: KTI070010RS485C) is an internal plug-in expansion printed circuit board engineered specifically for the Morley-IAS ZX series of intelligent multi-protocol fire alarm control panels. Operating over a derived internal panel supply of 18 to 28 Vdc, this module installs directly onto the host panel headers to establish optically isolated serial communications across inter-panel networks and dedicated peripheral equipment loops.
Host Fire Alarm Control Panel Compatibility
The 795-004-001 module interfaces directly with host motherboard connectors across the ZX family of multi-protocol panels. The panel firmware utilizes an integrated AUTO-LEARN facility to detect, register, and configure the module upon insertion:
- Morley-IAS ZX1e single-loop intelligent multi-protocol fire alarm control panels
- Morley-IAS ZX2e two-loop intelligent multi-protocol fire alarm control panels
- Morley-IAS ZX5e multi-loop (up to five loops) intelligent fire alarm control panels
- Morley-IAS ZX1Se compact single-loop intelligent fire alarm control panels
- Morley-IAS ZX2Se two-loop intelligent multi-protocol fire alarm control panels
- Morley-IAS ZX5Se multi-loop intelligent multi-protocol fire alarm control panels
High-Integrity Network Loop Expansion
For fault-tolerant fire network topologies requiring Class-A survivability, the 795-004-001 module functions as the base communication card required to drive the Morley-IAS Hi-485 conversion module (Part Number: 795-038-001). The Hi-485 module requires an RS485 card to be fitted in the host panel to maintain uninterrupted data transmission across the network loop during wiring faults.
Compatible Peripheral Devices and Remote I/O Hardware
When deployed as a dedicated peripheral communications bus, the RS485 card transmits bidirectional data between the host ZX panel and remote input/output devices, repeaters, and enunciators up to 1,200 meters (3,937 feet) per channel. Compatible field hardware includes:
| Peripheral Device Category | Model / Reference Part Number | Interface Purpose |
|---|---|---|
| Active Repeaters | 709-601-001 | Remote control and display repeat unit over peripheral RS485 bus |
| Passive Repeaters | 709-701-001, 709-752 | Remote display enunciator without panel control inputs |
| Relay Expansion Cards | 795-014 | 4-way programmable auxiliary relay output module |
| Sounder Circuit Cards | 795-015 | 4-way programmable monitored sounder output card |
| Monitored Input Cards | 795-029 | 8-way programmable monitored switch input card |
| Mimic Driver Hardware | 795-065 | 40-way geographical mimic display LED driver card |
External Communications, Protocol Interfaces, and Media Converters
The 795-004-001 communication module supports integration with external communication hardware and facility management head-ends using two-wire RS485 multidrop, Class-A, or Class-B cabling:
- Modem Interfaces: Compatible with RS485 dial-up telephone modems (Part Number: 3178-1090) and leased-line modems (Part Number: 3602-1001) for off-site monitoring.
- Fiber Optic Converters: Supports optical network isolation and extended distance links when coupled with Morley-IAS RS485 fiber optic interface cards (Part Numbers: 3071-0001 and 3071-0201).
- System Integration: Interfaces directly with Modbus protocol converters, external panel printers, paging interface modules, and supervisory graphical front-end management platforms including VisualeyeZ.
Transmission Cabling Specifications
To achieve the full 1,200-meter (3,937 ft) bus segment length, the RS485 communication module requires a dedicated shielded twisted-pair data cable with a minimum conductor cross-sectional area of 0.5 mm² (24 AWG). The module provides optical isolation to prevent electrical ground loops and common-mode signal interference along the multidrop transmission line.
