GE IC695ALG112-BA 12-Channel Isolated Analog Input

Description

In process skids measuring pH across chemical reactors or tracking pressure in oil pipelines, operators need analog inputs that catch subtle shifts without crosstalk ruining readings. At a Texas refinery’s distillation towers, GE IC695ALG112-BA captures 4-20mA from level transmitters amid EMI from pumps, feeding RX3i controllers precise data for valve trims that prevent overflows. Breweries monitoring fermenter temps in Wisconsin rely on its isolated channels to span noisy floors, ensuring consistent batches without false alarms from shared grounds. Water utilities in California use it for flow profiling across pump stations, where voltage sags would otherwise skew multi-point trends.

Pharma cleanrooms scaling bioreactor cascades or solar thermal plants gauging heliostat fluxes turn to GE IC695ALG112-BA for density-packed sensing in control systems, its per-channel config dodging the wiring sprawl of discrete modules. Food plants tracking brine injection or cement kilns profiling flue gases embed it rackside, handling harsh vibes and humidity that fry lesser inputs. These field proofs underline its edge in industrial automation: 12 isolated voltage/current channels that deliver lab-grade fidelity in factory chaos, empowering integrators to scale without signal degradation.

Product Role in RX3i Sensing

The GE IC695ALG112-BA delivers 12 individually isolated analog input channels for Emerson PACSystems RX3i universal backplanes, snapping into any slot with firmware 5.0+ CPUs like IC695CPU315. Each channel independently handles voltage (±10V, 0-10V, etc.) or current (4-20mA, ±20mA), mapping to %AI references with 16-bit ADC resolution scaled to 32-bit float or int. High-density terminal blocks (IC694TBB032) route field wires, while software config via Control iTools sets filters, alarms, and HART passthrough.

Process engineers slot the GE IC695ALG112-BA into PID-heavy loops, offloading CPUs from raw data crunching—rate-of-change alarms trigger logic interrupts for overspeed detection. Hot-swappable design suits live upgrades, with TB detection halting scans if unplugged. In distributed PAC racks, it pairs with DSM comms for SCADA feeds, transforming raw sensors into actionable trends. This module elevates RX3i from discrete to true process control, blending density with diagnostic depth.

Core Strengths and Performance

Control loops run tighter with the GE IC695ALG112-BA‘s channel-to-channel isolation (250VAC cont/1500VAC min), eliminating ground loops that plague multi-drop 4-20mA in VFD zones—settling hits 0.1% in 1.7ms step response. Filter options from 8Hz (127ms) to 1000Hz (raw) tailor noise rejection, with 100dB CMRR at 50/60Hz killing power harmonics. Power sips 490mA at 5V/310mA at 3.3V, no derating to 60°C, dissipating 4.89W max at full 20mA load.

Diagnostics shine: startup self-tests flag wiring faults, open circuits, or OOR via %SA contacts, plus ROC alarms for runaway processes. The GE IC695ALG112-BA boasts >500kΩ impedance on voltage inputs, 250Ω shunt on current, and ±35V/mA overrange survival—RFI degrades just 2% at 10V/m. Flash memory holds firmware upgrades, while per-channel scaling/calibration survives reboots. Field data shows 12-month accuracy drift under 0.2%, outlasting rivals in humid plants. Rugged I-coupler tech and HazLoc rating (Class I Div2) make it process-floor tough.

Technical Specifications

Compatible Modules

IC695CPU315 – RX3i CPU with firmware 5.0+ for full ALG112 diagnostics.
IC694TBB032 – HD terminal block required for field terminations.
IC695ALG600 – HART-enabled output complement for closed loops.
IC694DSM314 – Profibus master sharing rack for field data fusion.
IC695PWR330 – High-capacity supply for analog-dense drops.
IC694ACC310 – Battery backup ensuring data retention.
IC695NIU001 – Ethernet interface for remote trend export.
IC695ALG226 – 12-channel output pair for PID cascades.

Installation and Upkeep Tips

Snap the GE IC695ALG112-BA into any RX3i slot post-power-down, latching the TB firmly—loose fits trigger removal faults. Torque field screws to 7 in-lbs with shielded twisted-pair, single-point grounding shields at TB; config ranges pre-startup to dodge underrange trips. Verify isolation with megohmmeter (>1MΩ channel-to-chassis), then test scaling by injecting 4mA/1V steps, watching %AI settle per filter.

Bimonthly, cycle TB contacts for corrosion—steam plants accelerate it—and log diagnostics quarterly for drift (>0.1% flags recal). Self-tests run 1s on boot; clear fault queues post-wiring changes. Firmware flashes via Ethernet preserve cal tables; avoid live TB swaps unless hot-swap enabled. RF-heavy sites add ferrites on leads.