ABB Bailey IIEDI01 Loop Interface Module

Signal Processing and Loop Isolation

The ABB Bailey IIEDI01 connects field loops directly to Bailey control systems. This module conditions 4-20 mA signals from transmitters and sensors. It provides electrical isolation between field wiring and system electronics. Consequently, the module prevents ground loops from disturbing measurement accuracy.

Technical Specifications

Parameter	Specification
Model	IIEDI01
Category	Loop Interface Module
Height	310 mm
Width	30 mm
Depth	250 mm
Weight	0.68 kg
Input Channels	2 x differential analog inputs
Input Signal Range	4-20 mA or 0-20 mA (selectable)
Output Signal Range	4-20 mA (isolated)
Loop Power Supply	24 V DC (external, 18-30 V DC)
Isolation Voltage	1000 V RMS (channel to channel)
Accuracy	±0.15% of full scale
Connector Type	1 x 10-pin screw terminal block
Status Indicators	2 x green LEDs (channel active)
Internal Components	2 signal isolators, 1 DC-DC converter, 1 terminal block
Energy Storage	47 µF input filtering capacitor

Internal Architecture and Signal Path

The IIEDI01 contains four key internal components for signal conditioning. Two independent signal isolators handle each channel separately. One DC-DC converter generates isolated power for both input circuits. A 47 µF capacitor filters high-frequency noise from each input channel. The ABB Bailey IIEDI01 includes a 10-pin screw terminal block for field connections. Two green LEDs indicate active signal presence on each channel.

Channel Configuration and Field Wiring

Connect each 4-20 mA transmitter to its dedicated input terminal pair. Select the input range using the configuration jumpers before installation. Wire the loop power supply to the auxiliary power terminals first. Use twisted-pair shielded cable for all field signal connections. The IIEDI01 provides 1000 V RMS isolation between two channels. This feature prevents cross-channel interference in high-density installations.

Physical Dimensions and Installation Guidelines

The ABB Bailey IIEDI01 weighs 0.68 kilograms for stable rack mounting. Its height measures 310mm, width 30mm, and depth 250mm. This loop interface module consumes 3.8 watts from the backplane supply. Install the IIEDI01 in any standard Bailey I/O rack slot. The module operates reliably from 0°C to +55°C ambient temperature. The green LEDs illuminate when each channel receives a valid input signal.