Overview
Manuals
Isolator Options
Redundant Inputs
HART Signal Path
Features:
- Sixteen 4–20 mA field-input channels on a 12-inch IOTA with redundant analog input IOM support.
- Documented isolator choices include MTL4541, MTL4544 and MTL4575, with different channel densities and signal-conversion functions.
- Separate 0.5 A IOM feed fuses and a 1.5 A isolator feed fuse have exact manufacturer spare-part references.
The Honeywell CC-GAIX11 is a Series C I/O termination assembly designed for galvanically isolated and intrinsically safe analog input arrangements. The manufacturer's exact-model section describes up to sixteen 4–20 mA signals and redundant IOM support, while the compatibility matrix lists the 12-inch board format. The IOTA provides the physical termination and isolator interface; analog conversion, signal processing and HART capability depend on the fitted electronics and the complete supported signal path, rather than on the board name alone.
An installation can use sixteen single-channel MTL4541 isolators or eight dual-channel MTL4544 isolators for sixteen current-input channels. The listed MTL4575 option converts thermocouple or RTD measurements to 4–20 mA and therefore must not be described as a direct temperature input on the bare IOTA. Before replacement, document the channel assignments, isolator population, redundant IOM configuration and applicable hazardous-area loop drawings. A matching terminal assembly does not by itself establish intrinsic safety, field-device compatibility or an approved live-maintenance procedure; those decisions require the complete installed design and the relevant manufacturer instructions.
The CC-GAIX11 Honeywell Redundant GI/IS Analog Input IOTA may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell CC-GAIX11 official technical documentation and product links.
This multi-page Honeywell technical document contains the exact model and its technical data. Apply the values to the supplied type number and verify its revision before installation.
Choose the isolator population to match the actual field signals. The documented sixteen-channel arrangements use sixteen MTL4541 single-channel isolators or eight MTL4544 dual-channel isolators. MTL4575 supplies temperature-to-current conversion where required, and MTL4599 is the listed dummy isolator for unused positions. These are distinct components with their own ratings; do not assume they are included with a bare IOTA or that every isolator is interchangeable.
CC-GAIX11 supports redundant analog input IOMs for the same sixteen field channels. The guide's compatibility table lists CC-PAIH02 for HART and CC-PAIX02 for non-HART arrangements. Redundant electronics do not create additional field channels or duplicate each transmitter and isolator. Match the installed IOM generation, firmware requirements and channel configuration against the applicable system documentation before commissioning.
The guide identifies MTL4541 and MTL4544 as HART-capable current-input isolator options. A working HART path also requires compatible HART input electronics and an appropriate field device; fitting a barrier alone does not add HART functionality to a non-HART IOM. Confirm the complete loop, wiring and configured channel behavior, and keep temperature-converter arrangements distinct from native HART transmitter connections.
