GE IC695ALG704-AB 4-Channel Non-Isolated Analog Output Module (RX3i PACSystems)

Description

In many process control and industrial automation applications, engineers struggle with delivering precise analog signals to field devices like control valves, positioners, dampers, or variable frequency drives, where inaccurate or noisy outputs lead to poor regulation, inefficient energy use, or safety concerns. Non-isolated modules become particularly valuable when devices share a common ground reference, avoiding the cost and complexity of isolation while maintaining signal integrity in moderate-noise environments. This need grows in systems requiring configurable ranges for mixed voltage and current loops, fast update rates for responsive control, and high resolution to minimize quantization errors in critical loops. The GE IC695ALG704-AB meets these demands as a versatile 4-channel non-isolated analog output module in the PACSystems RX3i platform, offering per-channel selection of standard ranges: 0-10V, ±10V, 0-20mA, or 4-20mA. It delivers up to 16-bit resolution and an 8 ms update rate across all channels, making it essential for upgrades or new builds in industrial automation where high reliability and precise I/O signal control are priorities. In process control environments like chemical dosing, flow regulation, or temperature management, the GE IC695ALG704-AB ensures accurate actuation without over-specifying isolated channels, supporting seamless integration into RX3i racks for deterministic performance and easy scaling.

The GE IC695ALG704-AB slots into any position of an RX3i universal backplane, drawing power directly while connecting field wiring via removable terminal blocks (typically high-capacity types like IC694TBCxxx for optimal current handling). It converts digital values from the RX3i CPU into analog outputs, with full software configuration in Proficy Machine Edition defining range, scaling, alarms (high/high-high/low/low-low), and hold-last-state behavior. In the automation stack, it resides at the I/O layer below the CPU, providing outputs that drive actuators in closed-loop control while feeding diagnostic data upward for monitoring. On-board features include open-wire detection for current modes, over-range/under-range alarms, and automatic calibration—no manual adjustments needed. The non-isolated design shares a common return with the rack power supply, simplifying wiring in grounded systems. Diagnostics appear via front LEDs (module OK and configurable field status) and integrate into the CPU’s fault tables for quick visibility. Firmware upgrades occur through the programming tool, ensuring compatibility with evolving RX3i CPUs. In practice, the GE IC695ALG704-AB delivers flexible, high-density analog outputs in modern PACSystems setups, balancing precision with straightforward deployment.

Deploying the GE IC695ALG704-AB brings consistent signal accuracy with its high-resolution conversion and fast settling times, ensuring actuators respond predictably even in dynamic processes. Engineered for real-world plant conditions, it handles typical electrical noise and load variations, promoting high reliability and fewer calibration drifts over years of service.

Software-configurable ranges and alarms reduce engineering overhead—no hardware jumpers mean quicker commissioning and easier modifications as process needs change. Diagnostics enhance maintenance by flagging issues like open loops early, often allowing adjustments without pulling the module.

Overall, the GE IC695ALG704-AB provides long-term performance in non-isolated applications, delivering the precision and flexibility that support efficient, scalable control strategies.

The GE IC695ALG704-AB is frequently used in water treatment for dosing pump control, driving 4-20mA signals to metering valves in process control environments needing precise flow under continuous uptime. In manufacturing, it modulates variable speed drives or positioners on assembly lines, supporting fast update cycles amid vibration and temperature swings.

Pharmaceutical batching applications leverage it for accurate valve positioning in regulated settings, ensuring signal reliability and critical system uptime. The GE IC695ALG704-AB excels in these mid-density analog output scenarios requiring configurable, high-resolution control.

GE IC695ALG708 – 8-channel version for higher density needs

GE IC695ALG728 – 8-channel with HART protocol for smart device integration

GE IC695ALG704-AA – Earlier hardware revision

GE IC695ALG704-BB – Subsequent revision with potential minor updates

GE IC695ALG604 – Isolated analog output alternative for channel-to-channel separation

GE IC695ALG112 – Analog input module often paired for closed loops

GE IC694ALG392 – Series 90-30 compatible 8-channel output for legacy migrations

Before installing the GE IC695ALG704-AB, confirm your RX3i CPU firmware is version 3.0 or later and Proficy Machine Edition supports full configuration. Use a high-capacity terminal block to handle current loads, ensure proper grounding for non-isolated operation, and check backplane power budget against the module’s draw in loaded racks. Allow space for terminal block removal and verify field device compatibility with selected ranges.

Maintenance typically includes monitoring the two front LEDs for module and field status during regular checks. Periodically inspect terminal connections for tightness in vibrating setups, and review alarm logs in software for trends. Recalibration is rarely needed due to automatic compensation, but functional loop tests via forcing outputs confirm integrity without major disruption.