IC660BBD021 3 GE IC660BBD021-1 IC660BBD021 2 IC660BBD021 4

The GE IC660BBD021 is a robust sink-type digital I/O block in the GE Fanuc/Emerson Genius I/O family, designed for distributed automation and control systems that require flexible, high-density discrete I/O on DC networks. With 16 configurable circuits that can be set as discrete inputs, outputs, or tristate inputs, this module interfaces with both electromechanical devices and solid-state sensors across 24 VDC or 48 VDC networks. Its rugged isolation, comprehensive diagnostics, and seamless Genius Bus integration make it a reliable choice for industrial control environments.

Technical Specifications

Parameter	Description
Module Type	Sink-type Digital I/O Block
Model	IC660BBD021
Number of I/O Circuits	16 discrete channels (configurable)
Operating Voltage	24 VDC / 48 VDC (18–56 VDC)
Output Current	Up to 2 A per circuit (with up to 10 A inrush for ~10 ms)
Input Processing Time	~1.7 ms nominal
Isolation Voltage	~1500 V block-to-block & bus isolation
Selectable Input Filters	Yes — 10–100 ms range
Power Supply Dropout Time	~10 ms
Status Indicators	“Unit OK”, “I/O Enabled”; individual circuit LEDs
Compatible Assemblies	Electronics: IC660EBD021; Terminal Base: IC660TSD021
Approx. Dimensions (H × W × D)	224 × 90 × 112 mm
Weight	~1.8 kg (4 lbs)
Operating Temp.	0 °C – 60 °C
Storage Temp.	–40 °C – 100 °C
Humidity	5 % – 95 % non-condensing

Recommended Related Models

Model	Description
IC660BBD020	16-circuit sink/source digital I/O block
IC660BBD022	16-circuit source digital I/O block
IC660BBD023	24 VDC sink digital I/O block
IC660BBA100	115 VAC/125 VDC analog I/O block

Popular GE Genius I/O Components

Category	Representative Models
Genius Controllers	IC660CPU001, IC660CPU002
Discrete I/O	IC660BBD020, IC660BBD022
Analog I/O	IC660BBA020, IC660BBA023
Bus Drivers	IC660EBD024

Applications

The IC660BBD021 excels in industrial systems where dense discrete I/O and configurable logic points are required:

Distributed field I/O stations in manufacturing and process networks
Machine control panels interfacing photoelectric, proximity, or limit sensors
PLC systems requiring flexible input/output mapping on DC power
OEM automation with varying digital device standards
Systems with diagnostic needs for wiring and field device health

Its ability to handle both inputs and outputs in a compact block reduces panel complexity and system cost while maintaining high reliability.

Advantages

Configurable channels — Each of the 16 circuits can be an input, output, or tristate input, offering maximum design flexibility.
High load capability — Outputs support up to 2 A per channel with high inrush tolerance.
Advanced diagnostics — Includes open wire, overtemperature, failed switch, overload, and no-load detection.
Strong electrical isolation — ~1500 V isolation across blocks and bus for noise immunity.
Genius Bus compatible — Seamlessly integrates into distributed Genius I/O architectures.
Robust construction — Designed for harsh industrial environments with wide temperature and humidity tolerance.

Technical FAQs

How many discrete circuits are supported?
The module provides 16 configurable I/O circuits configurable as inputs, outputs, or tristate inputs.
What DC voltage range does it operate on?
It supports 24 VDC or 48 VDC systems with an input range of 18–56 VDC.
What is the maximum current per output?
Each circuit can deliver up to 2 A, with inrush handling of 10 A for short bursts.
What are typical diagnostics available?
Includes short circuit, overload, no load, open wire, overtemperature, and failed switch detection.
What is the response time for digital inputs?
Typical input processing time is about 1.7 ms, plus selectable filter delay.
Is separate block power required?
No — block circuits are powered from the same DC supply that energizes the field devices.
Does it support LED status indication?
Yes — it has LEDs for “Unit OK”, “I/O Enabled”, and individual circuit status.
What isolation is provided?
Approximately 1500 V isolation between blocks and system bus enhances safety.
Where is it typically mounted?
Mounted on a terminal base assembly (IC660TSD021) or similar rackless configuration.
Which controllers is it compatible with?
It integrates with Genius I/O controllers such as IC660CPU001 and IC660CPU002.