GT-12FA Digital Input Module

Copyright and Disclaimer

Copyright © 2025 Beijer Electronics AB. All rights reserved.

The information in this document is subject to change without notice and is provided as available at the time of printing. Beijer Electronics AB reserves the right to change any information without updating this publication. Beijer Electronics AB assumes no responsibility for any errors that may appear in this document. All examples in this document are only intended to improve understanding of the functionality and handling of the equipment. Beijer Electronics AB cannot assume any liability if these examples are used in real applications. In view of the wide range of applications for this software, users must acquire sufficient knowledge themselves in order to ensure that it is correctly used in their specific application. Persons responsible for the application and the equipment must themselves ensure that each application is in compliance with all relevant requirements, standards, and legislation in respect to configuration and safety. Beijer Electronics AB will accept no liability for any damage incurred during the installation or use of equipment mentioned in this document. Beijer Electronics AB prohibits all modification, changes, or conversion of the equipment.

Head Office

Beijer Electronics AB
Box 426
201 24 Malmö, Sweden
www.beijerelectronics.com / +46 40 358600

1. About This Manual

This manual contains information on the software and hardware features of the Beijer Electronics GT-12FA Digital Input Module. It provides in-depth specifications, guidance on installation, setup, and usage of the product.

1.1. Symbols Used in This Manual

This publication includes Warning, Caution, Note, and Important icons where appropriate, to point out safety-related or other important information. The corresponding symbols should be interpreted as follows:

• ⚠️ WARNING: The Warning icon indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury, and major damage to the product.
• ⚠️ CAUTION: The Caution icon indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury, and moderate damage to the product.
• ? NOTE: The Note icon alerts the reader to relevant facts and conditions.
• ❗ IMPORTANT: The Important icon highlights important information.

2. Safety

Before using this product, please read this manual and other relevant manuals carefully. Pay full attention to safety instructions!

In no event will Beijer Electronics be responsible or liable for damages resulting from the use of this product.

The images, examples, and diagrams in this manual are included for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Beijer Electronics cannot take responsibility or liability for actual use based on the examples and diagrams.

2.1. Product Certifications

The product has the following product certifications:

• UL
• CE
• FCC
• CUL

2.2. General Safety Requirements

WARNING:

• Do not assemble the products and wires with power connected to the system. Doing so can cause an "arc flash", which can result in unexpected dangerous events (burns, fire, flying objects, blast pressure, sound blast, heat).
• Do not touch terminal blocks or IO modules when the system is running. Doing so may cause electric shock, short circuit, or malfunction of the device.
• Never let external metallic objects touch the product when the system is running. Doing so may cause electric shock, short circuit, or malfunction of the device.
• Do not place the product near inflammable material. Doing so may cause a fire.
• All wiring work should be performed by an electrical engineer.
• When handling the modules, ensure that all persons, the workplace, and the packing are well grounded. Avoid touching conductive components; the modules contain electronic components that may be destroyed by electrostatic discharge.

CAUTION:

• Never use the product in environments with temperature over 60°C. Avoid placing the product in direct sunlight.
• Never use the product in environments with over 90% humidity.
• Always use the product in environments with pollution degree 1 or 2.
• Use standard cables for wiring.

3. About the G-series System

Image of the Beijer Electronics GT-12FA Digital Input Module, a compact industrial module with a 40-pin connector.

System Overview

Diagram illustrating the G-series system architecture. It shows a User Interface connected to a Processor Module via Network/Serial Communication. The Processor Module communicates with an Expansion Module via a Service Messaging Protocol. The system includes a Network Adapter Module and multiple Expansion Modules in slots. Connections include field power (Field Vcc/GND) and bus communication.

• Network Adapter Module: The network adapter module forms the link between the field bus and the field devices with the expansion modules. The connection to different field bus systems can be established by each of the corresponding network adapter module, e.g., for MODBUS TCP, Ethernet IP, EtherCAT, PROFINET, CC-Link IE Field, PROFIBUS, CANopen, DeviceNet, CC-Link, MODBUS/Serial etc.
• Expansion Module: Expansion module types: Digital IO, Analog IO, and Special modules.
• Messaging: The system uses two types of messaging: Service messaging and IO messaging.

3.1. IO Process Data Mapping

An expansion module has three types of data: IO data, configuration parameter, and memory register. The data exchange between the network adapter and the expansion modules is made via IO process image data by internal protocol.

Diagram showing data flow between the Network Adapter and Expansion Modules. Data is read from or written to expansion modules via Input/Output image data. The Network Adapter handles Read Data and Write Data for up to 63 slots.

The input and output image data depend on the slot position and the data type of the expansion slot. The ordering of input and output process image data is based on the expansion slot position. Calculations for this arrangement are included in the manuals for network adapter and programmable IO modules.

Valid parameter data depends on the modules in use. For example, analog modules have settings of either 0-20 mA or 4-20 mA, and temperature modules have settings such as PT100, PT200, and PT500. The documentation for each module provides a description of the parameter data.

4. Specifications

4.1. Environmental Specifications

4.2. General Specifications

* Operating temperature: -40 - 70 °C temperature range specification can be guaranteed under the following conditions:
- Supply voltage: 26.4 V below.
- Otherwise, temperature specification can be guaranteed with -40 - 60 °C.

4.2.1. Dimensions

Technical drawings showing the dimensions of the module in millimeters (mm). The main module dimensions are approximately 99mm (length) x 35mm (width) x 75mm (height), with specific mounting points indicated.

4.3. Input Specifications

5. Wiring Diagram

Schematic showing the wiring connections for the GT-12FA module. It details G-Bus contacts and Field Power Contacts, indicating system power (5V, GND) and field power (24VDC, 0Vdc). It also shows input channels (CH0-CH31) and common terminals.

6. LED Indicator

Diagram of the GT-12FA module front panel, showing numbered LED indicators for input channels 0 through 31.

6.1. LED Channel Status

7. Mapping Data Into the Image Table

Table illustrating the mapping of input module data bits (D0-D31) to input image values (Bit 0-Bit 7) across multiple bytes (Byte 0-Byte 3).

8. Parameter Data

Valid parameter length: 2 bytes

9. Hardware Setup

CAUTION:

• Always read this chapter before installing the module!
• Hot surface! The surface of the housing can become hot during operation. If the device is used in high ambient temperatures, always let the device cool down before touching it.
• Working on energized devices can damage the equipment! Always turn off the power supply before working on the device.

9.1. Space Requirements

The following drawings show the space requirements when installing the G-series modules. The spacing creates space for ventilation, and prevents conducted electromagnetic interference from influencing the operation. Installation position is valid vertical and horizontal. The drawings are illustrative and may be out of proportion.

CAUTION: NOT following the space requirements may result in damaging the product.

Diagrams illustrating required spacing for G-series modules for ventilation and electromagnetic interference prevention. One diagram shows side-by-side module spacing (20mm horizontal, 30mm vertical), and another shows distance to enclosure door (50mm).

9.2. Mount Module to DIN Rail

The following chapters describe how to mount the module to the DIN rail.

CAUTION: The module must be fixed to the DIN rail with the locking levers.

9.2.1. Mount GL-9XXX or GT-XXXX Module

The following instructions apply to these module types:

• GL-9XXX
• GT-1XXX
• GT-2XXX
• GT-3XXX
• GT-4XXX
• GT-5XXX
• GT-7XXX

GN-9XXX modules have three locking levers, one at the bottom and two on the side. For mounting instructions, refer to Mount GN-9XXX Module.

Illustrations showing how to mount and dismount modules to a DIN rail using locking levers. One set shows inserting and locking, the other shows pulling out and unlocking.

9.2.2. Mount GN-9XXX Module

To mount or dismount a network adapter or programmable IO module with the product name GN-9XXX, for example GN-9251 or GN-9371, see the following instructions:

Illustrations depicting the process of mounting and dismounting GN-9XXX modules to a DIN rail, showing the engagement and disengagement of locking mechanisms.

9.3. Field Power and Data Pins

Communication between the G-series network adapter and the expansion module, as well as system / field power supply of the bus modules is carried out via the internal bus. It is comprised of 2 Field Power Pins and 6 Data Pins.

WARNING: Do not touch the data and field power pins! Touching can result in soiling and damage by ESD noise.

Diagram showing the Field Power Pins (P7, P8) and Data Pins (P1-P6) on the GT-xxxx module. It details the function of each pin, such as System VCC, System GND, Serial Input/Output, and Field GND/VCC.