Overview
The 795-038-001 is the Morley‑IAS / Honeywell HI‑485 communications expansion module (PCB only) for ZX series intelligent addressable fire alarm control panels. It provides an optically isolated Hi‑485 (high‑integrity RS‑485) communications interface for panel networking and peripheral connections.

• Hi‑485 (high‑integrity) RS‑485 communications interface for robust, closed‑loop networks.
• Plug‑in expansion PCB designed specifically for Morley‑IAS ZX series panels.
• Optically isolated serial ports supporting panel networking, repeaters and remote I/O.
• Supports Class‑A and Class‑B networking topologies (refer to manufacturer datasheet for wiring options).

Use cases

• Network multiple ZX panels for large installations and site‑wide alarm management.
• Connect repeaters, remote I/O and third‑party front ends to the panel bus.
• Suitable for higher‑integrity/critical applications where a Hi‑485 interface is required.

Safety & installation
This is a circuit board expansion module intended to be installed into the designated expansion slot of a compatible ZX series control panel. Installation and commissioning should be carried out by a qualified fire‑alarm engineer in accordance with local regulations and the manufacturer's installation instructions. Refer to the official Honeywell/Morley datasheet for approvals, detailed wiring diagrams and isolation requirements.

Compliance
Refer to the manufacturer's datasheet for CE / UKCA and other regulatory approvals; do not assume compliance without checking the official documentation.