ABB GFD233A 3BHE022294R0103
This module is a Fail-Safe Digital Input Module from ABB's renowned AC 800M High Integrity family, specifically designed for safety-critical applications (up to SIL 3 according to IEC 61508).
Quick Overview
Product Family: AC 800M High Integrity
Module Type: Failsafe Digital Input (FDI)
Main Function: Reads digital (on/off) signals from field devices (e.g., emergency stops, safety interlocks, level switches) in safety-oriented systems.
Key Feature: Designed with redundant internal circuits and diagnostics to detect internal faults and ensure a safe state, making it suitable for Safety Instrumented Systems (SIS).
Detailed Technical Parameters
| Parameter Category |
Specification |
| Article Number / Ordering Code |
3BHE022294R0103 (This is the full order code) |
| Product Type |
GFD233A (This is the base product code) |
| Description |
Fail-Safe Digital Input Module 8 Channels |
| Number of Channels |
8 |
| Input Type |
Sink or Source (configurable per channel), Dry Contact or 24V DC (NAMUR) |
| Rated Voltage |
24 V DC (Nominal) |
| Operating Voltage Range |
19.2 V DC to 30 V DC |
| Power Consumption |
Typically 60 mA (internal) + 2.5 mA per powered channel (external) |
| Signal Level "1" (On) |
15 V to 30 V DC (for standard 24V inputs) |
| Signal Level "0" (Off) |
-3 V to 5 V DC |
| Input Impedance |
Typically 3.9 kΩ |
| Diagnostics |
Extensive: Wire-break detection, cross-circuit detection, short-circuit to high-voltage detection, loss of power supply detection, internal hardware diagnostics. |
| Isolation |
500 V AC between field side and system side (internal logic). |
| Connection |
Via a separate FTA (Field Termination Assembly) module (e.g., FI810F) that mounts directly on top of the controller. This handles the physical wiring. |
| Safety Integrity Level (SIL) |
SIL 3 (As a single part of a system, according to IEC 61508). The final SIL level of the entire Safety Instrumented Function (SIF) must be calculated during system design. |
| Response Time |
Typically < 10 ms (configurable filter time can affect this) |
| Certifications |
IEC 61508, ATEX, IECEx, cULus Listed for Class I Div 2, and others. |
| Operating Temperature |
0 °C to +60 °C |
| Storage Temperature |
-40 °C to +70 °C |
| Relative Humidity |
5% to 95% (non-condensing) |
| Mounting |
On a DIN rail within an AC 800M controller rack. |
Key Features and Applications
High Availability & Safety: The dual-channel design and continuous self-diagnostics ensure that the module will de-energize its outputs to a safe state (as defined by the safety logic) if any internal fault or field wiring fault is detected.
Flexible Configuration: Each channel can be individually configured in the control logic (using ABB's Control Builder M software) for parameters like signal type (sink/source), filter time, and behavior upon detection of a fault.
Wire-Break Detection: A crucial feature for safety inputs. The module can inject a small diagnostic current to detect if the field wiring to a sensor has been broken, which might otherwise be interpreted as a "safe" (Off) state.
Typical Applications:
Emergency Stop (E-Stop) buttons
Safety gate switches and interlocks
Fire and gas detection systems
Process shutdown valves and switches
Critical level and pressure switches in industrial plants (chemical, oil & gas, power generation)
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