GE IC660BBD021 24/48V Sink I/O 16 Circuit Block

GE IC660BBD021 Genius I/O Block

Product Introduction

The IC660BBD021 functions as a Sink I/O block within the GE Genius I/O series. GE Fanuc originally designed this module for the Series 90-30 PLC system. It supports 16 discrete circuits, and you can configure each one independently as an input, output, or tristate input. This block works seamlessly with 3-wire solid-state sensors and electromechanical relays. Moreover, it provides comprehensive diagnostic features including short circuit, over-temperature, and open wire detection. The Genius protocol ensures reliable communication with the master controller.

Key Technical Specifications

The IC660BBD021 operates on a nominal voltage of 24 VDC or 48 VDC. Each circuit delivers a steady-state output current up to 2 Amperes. The maximum inrush current reaches 10 Amperes for up to 10 milliseconds. Input processing time measures 1.7 milliseconds, plus any delay from the selected input filter. The output on-delay time is only 1.0 millisecond.

For isolation, the block provides 1500 Volts block-to-block. The power supply dropout time equals 10 milliseconds. Maximum switching frequency is once per second. The module includes Unit OK and I/O Enabled LEDs on the front panel. Each of the 16 circuits has an individual load side indicator that illuminates when a connection is active.

Input and Output Characteristics

Input channels on the IC660BBD021 have specific voltage thresholds. At 24 VDC, the ON-state voltage ranges from 0 to 8 VDC, while the OFF-state voltage spans 17 to 24 VDC. At 48 VDC, ON-state is 0 to 16 VDC, and OFF-state is 34 to 48 VDC. Output circuits handle a maximum total current of 15 Amperes when installed at 35 degrees Celsius. The block uses terminals 6 through 21 for the 16 circuits. Outputs connect to DC-, and inputs connect to DC+ without requiring logic inversion.

Tristate Input Configuration

Using a terminal as a tristate input on the IC660BBD021 requires one resistor mounted at the dry contacts of the input device. This configuration enables open wire diagnostic availability. The open wire detection feature helps you identify broken connections quickly. Additionally, the block powers all circuits internally, so no separate supply is necessary for the field devices.

Diagnostic and Protection Features

The IC660BBD021 includes extensive diagnostic and protective capabilities. It monitors for electronic short circuits, over-temperature, failed switch conditions, open wires (on tristate inputs), overload, and no-load situations. Protective mechanisms prevent damage due to overload by shutting down the affected circuit. The block reports all errors to a handheld monitor and takes appropriate corrective action. These features significantly reduce troubleshooting time and improve system reliability.

Compatibility and Assembly Requirements

The IC660BBD021 consists of two main components. The electronics assembly is IC660EBD021, and the terminal base assembly is IC660TSD021. These two parts work together to form the complete I/O block. The module connects to a Genius bus network as a single distributed I/O node. It also includes a port for Hand-Held Terminal (HHM) communication, allowing local monitoring and configuration. For daisy-chaining, use Serial Port 1 and Serial Port 2, plus Shield In and Shield Out ports.

Mechanical and Environmental Parameters

The IC660BBD021 measures 8.83 inches (22.44 cm) in height, 3.56 inches (9.04 cm) in width, and 4.42 inches (11.23 cm) in depth. It weighs approximately 4 pounds (1.81 kg). The operating temperature range is 0 to 60 degrees Celsius. Storage temperature spans from -40 to 100 degrees Celsius. Humidity tolerance is 5% to 95% non-condensing.

Installation Guidelines

First, install the IC660BBD021 inside a protective enclosure because it is considered open equipment. The installation area must be clean and free from airborne contaminants. Adequate airflow is essential since the block uses convection cooling for temperature management. You can mount the block right-side up or upside down. However, grounding is critical. Use a short wire lead and proper grounding techniques.

Before disconnecting block power, always disconnect circuit power first. Applying power to field terminals while touching the pins can cause electrical shock. To replace an electronics assembly, first connect a handheld monitor. Monitor the circuits from the HHM menu, then turn it off and disconnect. Power down the block, remove the old electronics assembly IC660EBD021, and install the new one.

Packaging List

• IC660BBD021 complete I/O block (1 unit)

• Terminal base assembly IC660TSD021 (integrated)

• Electronics assembly IC660EBD021 (integrated)

• Mounting screws with star washers

• Quick start guide

Note: No certificates or warranty documents are included.

Shipping Information

We ship worldwide via FedEx, UPS, or DHL. All packages include tracking and proper anti-static protection.

Frequently Asked Questions (FAQ)

1. Can the IC660BBD021 work with 3-wire sensors?
Yes, the IC660BBD021 is specifically compatible with 3-wire solid-state sensors and electromechanical sensors. Each circuit supports this wiring type without needing additional power.

2. What is the difference between IC660BBD020 and IC660BBD021?
The IC660BBD020 is a Source I/O block, while the IC660BBD021 is a Sink I/O block. Source blocks supply current to outputs, whereas sink blocks receive current from field output devices.

3. How do I enable open wire detection on a tristate input?
For the IC660BBD021, you must install one resistor at the dry contacts of the input device. This configuration enables the open wire diagnostic feature for that circuit.

4. What happens during an overload condition?
The IC660BBD021 detects the overload immediately. Its protective mechanism shuts down the affected circuit to prevent damage. The block also reports the error to the handheld monitor.

5. Is the IC660BBD021 compatible with IC660TSD020?
No, the IC660BBD021 requires the IC660TSD021 terminal base assembly. It is not compatible with IC660TSD020 or earlier versions. Always verify your assembly version before installation.