GE IC660EBA026 Current Source Input Block

This input block accepts analog current signals from field transmitters. It converts 4-20 mA loops into digital values for the Genius bus system. You can rely on this unit for precise process measurements in harsh industrial settings.

Technical Specifications

Parameter	Value
Model	GE IC660EBA026
Category	Current Source Input Block
Number of Inputs	8 isolated channels
Input Signal Range	4–20 mA (source type)
Input Impedance	250 Ω per channel
Resolution	12 bits (1 part in 4096)
Accuracy	±0.1% of full scale at 25°C
Conversion Time	10 ms per channel
Power Supply Required	24 VDC ±10%, 150 mA
Field Loop Power	24 VDC (block supplies it internally)
Dimensions (H x W x D)	14.5 cm × 4.8 cm × 12.2 cm
Weight	0.48 kg (1.06 lbs)
Connector Type	Two 18-pin removable terminal strips
Component Count	1 logic board + 8 current sense resistors + 8 analog isolators + terminal blocks
Energy Storage	330 µF input filter capacitor
Isolation	2500 VAC (channel-to-bus)

Input Design and Signal Processing

Each channel uses a precision 250 Ω resistor for current-to-voltage conversion. The GE IC660EBA026 provides loop power directly to 2-wire transmitters. You do not need an external power supply for your field devices. Moreover, the block buffers each input through an analog isolator for noise immunity.

Performance and Accuracy

This input block delivers 12-bit resolution across the entire 4-20 mA range. Its accuracy stays within ±0.1% under normal operating temperatures. Each channel converts its signal in just 10 milliseconds. Consequently, you can capture fast-changing process variables without missing critical data.

Installation and Wiring

Two removable terminal strips simplify field wiring connections significantly. You can wire each transmitter as a current source without worrying about ground loops. The block mounts directly onto a Genius I/O terminal base. For best results, use twisted-pair shielded cable for every analog input.

Energy Storage and Power Management

A 330 µF capacitor maintains stable voltage during momentary supply dips. The block draws only 150 mA from the 24 VDC bus. Meanwhile, it sources up to 40 mA of loop power per channel. This internal power capability reduces your panel’s component count.

Visual Status Indicators

Eight green LEDs show the active status of each analog channel. A single red LED indicates a loss of field power or an overrange condition. Therefore, technicians can identify faulty loops without opening the cabinet.

Why Choose This Block

This input block replaces older analog modules while using the same base wiring. Its sourcing capability works perfectly with 2-wire pressure and temperature transmitters. As a result, you will simplify your next control system retrofit project.