Description

The IC693ALG221 is a 4-channel analog current input module designed for installation within the GE Series 90-30 Programmable Logic Controller system. It provides four single-ended input channels, each engineered to convert external analog current signals into digital values for application processing. The module accommodates two software- or hardware-selectable operating current ranges: a factory default range of 4 to 20 mA and an alternative range of 0 to 20 mA, which is activated by adding external jumpers directly to the interface terminal block assembly.

Digital representation of the converted current signal provides 12-bit binary resolution (representing 1 part in 4096) across either operational current range. The formatted user values are placed within the %AI controller registers using a 16-bit 2's complement database configuration. Dedicated to fast-moving industrial monitoring loops, the processing internal conversion hardware executes at a speed of one-half millisecond per channel, ensuring an entire module database update rate of 2 milliseconds across all four active channels. The IC693ALG221 interfaces directly with the host PLC through standard 5-slot or 10-slot baseplates.

Features

• Provides 4 discrete analog current input channels within a single slot footprint.
• Dual operating selections covering standard 4 to 20 mA and 0 to 20 mA industrial loops.
• Built-in 12-bit binary resolution offering clear signal representation over both current scales.
• Swift processing response with a 0.5 millisecond conversion rate per channel and 2-millisecond total module sweep.
• Provides high continuous common-mode protection running up to 200 V without damage.
• Optical components isolate field-side electronics from the sensitive logic backplane bus.
• Faceplate status indicator LED verifying the health and output status of the internal converter power circuits.

Applications

• Multi-channel instrumentation tracking including flow rates, process pressures, and liquid level measurements.
• Direct interface links to industrial current transmitters and factory process sensors.
• Monitoring remote variable frequency drive feedback loops and machinery current parameters.
• Automated systems requiring high-speed data acquisition loops across heavy industrial machinery installations.

Ordering Information

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Range Modification Setup: The module ships with a factory default measurement range of 4 to 20 mA. To change individual pairs of channels to the 0 to 20 mA mode, install a physical range jumper across terminals 1 and 2 for channels 1 and 2, and terminals 11 and 12 for channels 3 and 4.
• Noise and Cable Shielding: Wire all external plant field connections using high-quality twisted, shielded instrumentation-grade cable to avoid noise insertion and decrease capacitive loading. The copper shields must be tied securely to either the COM terminal or the frame GND connection.
• Common Mode Management: For signals coming from floating electrical current sources, limit common-mode voltages by physically connecting the negative return line of the current source directly to its corresponding channel COM pin.
• Baseplate Allocation: This hardware option can be installed into any standard input/output slot on a 5-slot or 10-slot baseplate assembly within a Series 90-30 configuration layout.
• Severe RF Interference Mitigation: Under conditions matching high electromagnetic or radio interference environments (such as IEC 801-3, 10V/m), system accuracy tolerances can drift or degrade down to +/-0.5% of full scale.