GE IC695ALG112 12‑channel isolated analog input module

Description

In real plants, the GE IC695ALG112 shows up wherever you need clean, trustworthy analog data feeding a PAC, rather than a tangle of signal conditioners and ad‑hoc wiring. Production teams in food and beverage rely on it to read level transmitters, flowmeters, and temperature probes that keep batching, CIP, and filling processes inside tight quality limits. In chemical and pharma skids, it lets engineers bring multiple 4–20 mA loop transmitters and 1–5 V pressure or pH signals directly into the RX3i rack, with isolation that helps maintain regulatory traceability and reduces cross‑talk between channels. On large air‑handling or chiller systems, it is a practical way to aggregate differential pressure, return/supply temperature, and valve position feedback into a single point of control without adding separate signal modules. The GE IC695ALG112 is widely used in industrial automation to consolidate field transmitters into one PACSystems RX3i backplane, cutting panel space while improving noise immunity and diagnostic visibility. Typical control systems use it for continuous control loops—flow, pressure, temperature, level, position—where stable, high‑resolution measurements directly influence PID performance, energy efficiency, and uptime. Instead of treating analog I/O as a weak link, this module lets integrators harden that layer, giving them per‑channel flexibility and robust isolation that hold up when cabinets are crowded, grounding is imperfect, or cable runs are long and exposed.

Product introduction and role

The GE IC695ALG112 is a 12‑channel isolated analog input module for the Emerson (GE Fanuc) PACSystems RX3i platform, designed to bring voltage and current signals from the field directly into the controller with per‑channel configuration. It sits in a single universal RX3i backplane slot and draws internal power from both the 3.3 V and 5 V rails, so no external excitation supply is needed for its electronics. Within the system architecture, it acts as the main analog measurement front end, converting field signals such as 0–10 V, ±10 V, 0–5 V, 1–5 V, 0–20 mA, 4–20 mA, and ±20 mA into 16‑bit values usable in the CPU’s logic, trending, and data logging. Each channel can be configured individually for voltage or current ranges, allowing one GE IC695ALG112 to handle mixed instrumentation in a single process area instead of forcing one‑range‑per‑card compromises. In a typical RX3i control system, this module lives alongside discrete I/O, motion, and comms modules, feeding analog data into PID blocks, alarm logic, and SCADA interfaces without external scaling hardware. Engineers and integrators value it because it combines isolation, filtering, and diagnostics in one package, which shortens commissioning time and simplifies troubleshooting when loops drift or wiring issues appear.

Key technical strengths and benefits

One of the main strengths of the GE IC695ALG112 is its combination of 12 fully isolated channels with flexible input ranges, so each transmitter can be treated as an independent circuit. This per‑channel isolation helps break ground loops and reduce interference, which is especially useful when field instruments are powered from different sources or routed through noisy cable trays. High‑resolution 16‑bit conversion and fast update capability make the module suitable for both slow process variables and faster loops such as pressure or flow where response time affects control quality and stability. Engineers can take advantage of software‑configurable scaling and offsets so that engineering units (bar, °C, m³/h, etc.) are handled at the controller level, cutting down on manual calculations and making logic easier to read and maintain.

Another practical benefit is the integrated digital filtering with selectable cutoff frequencies. The GE IC695ALG112 offers multiple filter options that let you trade off noise rejection against response time, which matters when you want smooth, stable values from noisy transmitters without losing important dynamics. Built‑in open‑circuit detection for voltage and 4–20 mA inputs allows the controller to flag broken wires or disconnected sensors quickly, improving safety and reducing time spent chasing intermittent faults. High, low, high‑high, and low‑low alarms on each channel can be configured to raise warnings or trips directly in the logic, so abnormal process conditions are caught near the source rather than buried in downstream calculations.

From a hardware standpoint, the GE IC695ALG112 is designed for long‑term reliability in industrial environments. It is rated for continuous overvoltage and overcurrent levels beyond normal operating ranges, giving a margin of protection when wiring mistakes or transient conditions occur. Isolation between the terminal block, backplane, and channels supports continuous industrial service and reduces the risk of a single wiring issue propagating into the whole rack. The module’s power dissipation and thermal design are specified to avoid derating within the normal RX3i operating temperature range, which helps it run reliably in densely populated cabinets as long as basic ventilation guidelines are followed.

Detailed technical specifications

Related and compatible modules

IC695ALG106 – 6‑channel version from the same RX3i isolated analog input family, suitable when fewer high‑integrity channels are needed in a small panel section.​
IC694TBB032 – Standard box‑style terminal block used to land field wiring to the GE IC695ALG112, providing robust screw terminals for industrial cables.​
IC694TBS032 – Spring‑style terminal block option for faster wiring and field changes while still mating directly with the module’s front connector.​
IC694TBB132 – Extended box‑style terminal block that offers more wiring space where larger conductors or extra labeling are required​
IC695CPU315 – PACSystems RX3i CPU that typically reads data from the GE IC695ALG112 for use in PID loops, data logging, and SCADA integration.umiak+1​
IC695ETM001 – Ethernet interface for RX3i, often used alongside the GE IC695ALG112 to publish analog data to plant networks and higher‑level systems.​
IC694PSM001 – RX3i power supply providing the 3.3 V and 5 V rails that feed the module, important when sizing power for multiple analog cards in one rack.emerson+1​

Installation and maintenance guidance

Before installing the GE IC695ALG112, confirm there is sufficient backplane power headroom at both 3.3 V and 5 V to support its current draw along with any other high‑consumption modules. It should be mounted in an RX3i universal backplane slot with adequate airflow, typically leaving some vertical clearance so heat from analog cards does not accumulate near the top of the cabinet. Field wiring should be planned with clear segregation between low‑level analog lines and high‑energy cables; twisted, shielded pairs are recommended for current and low‑level voltage signals, with shields grounded at a single point to minimize ground loops. Selecting the correct front‑mounted terminal block (box or spring style) and labeling each channel at the terminal strip make future diagnostics and expansions much easier.

For maintenance, regular visual inspection of the GE IC695ALG112 and its terminal block helps catch loose terminations, corrosion, or mechanical stress on conductors. Periodic loop checks—comparing known calibration sources or transmitter outputs to the values reported in the control system—help verify that scaling, filters, and alarms remain correctly configured as process conditions change. The module’s built‑in open‑circuit detection and per‑channel alarm bits should be incorporated into diagnostics screens so technicians can quickly see which channel has wiring or sensor issues. When the module must be replaced, the RX3i platform supports hot‑swap capability when used according to the manufacturer’s instructions, but many sites still prefer planned stops so configuration, firmware level, and wiring can all be verified methodically.