Overview
Manuals
LFD Channel Allocation
Switch Input Wiring
Redundant IOM Feeds
Features:
- Nominal 12-inch termination assembly supports redundant IOMs and up to 32 switch or proximity-detector inputs with MTL4516 isolators.
- The MTL4517 system line-fault arrangement reserves the last channel pair and provides 30 usable field inputs, with MTL4599 in slot 16.
- Separate upper-IOM, lower-IOM and isolator feeds are protected by the model-specific F1, F2 and F3 fuse arrangement.
The Honeywell CC-GDIL11 is a GI/IS digital input IOTA intended to terminate discrete field circuits for the Series C control platform. Honeywell's hardware matrix lists a 12-inch redundant arrangement with thirty-two channels when sixteen MTL4516 isolators are installed. The board illustration identifies PWA 51306315-175 and shows two CC-PDIL01 IOM positions. The terminal assembly, isolators and input electronics perform different roles; IOM timing, input-processing features and diagnostic behavior should not be treated as intrinsic specifications of the bare IOTA.
The isolator population determines how the final channels are used. For the documented MTL4517 line-fault reporting configuration, only thirty field inputs are available, channel 31 is configured for the fault alarm and channel 32 is unavailable as a normal input. Honeywell's usage diagram requires an MTL4599 dummy in slot 16 whenever any MTL4517 is fitted in slots 1 through 15. Maintenance planning must therefore preserve both physical wiring and the controller's channel assignments. A replacement selected solely by its maximum thirty-two-channel description could leave the fault-reporting arrangement incorrectly configured or create an unsupported field connection.
The CC-GDIL11 Honeywell Redundant GI/IS Digital 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-GDIL11 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.
With the MTL4517 system line-fault arrangement, channels 1 through 30 remain available for field inputs. Channel 31 is assigned to the line-fault alarm and channel 32 is not available as a normal input. Honeywell requires an MTL4599 in slot 16 if any MTL4517 is installed in the first fifteen positions. Preserve this allocation in both physical wiring and the control configuration.
The model-specific diagram routes pairs of switch or proximity-detector circuits through their assigned galvanic isolators before the signals reach the DI IOM. Use the correct sensor and isolator wiring drawing, including the resistor arrangement required when line-fault detection is enabled for switch inputs. Maintain field-wire identification and shield grounding; the IOM's 24 Vdc designation is not permission to apply that voltage directly to an intrinsically safe sensor circuit.
The board illustration shows two CC-PDIL01 positions, and the spare-parts table assigns separate 0.5 A fuses to the upper and lower IOM feeds. The isolators have a separate 2 A feed fuse. IOM redundancy does not eliminate the need to check the isolator supply and each field circuit. Confirm the installed IOM revisions and supported redundancy configuration before replacing or pairing electronics.
