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- Siemens
- 6ES7132-4HB01-0AB0
- Digital Output Relay Module
- Germany
- 15 × 81 × 52 mm
- 0.196 kg
- Xiamen, China
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Product Overview
The Siemens 6ES7132-4HB01-0AB0 Digital Output Relay Module is a two-channel relay output module belonging to the SIMATIC ET 200S distributed I/O system. It is used to switch external electrical loads through relay contacts controlled by PLC output signals.
Unlike semiconductor-based digital output modules, this model uses electromechanical relay contacts. This allows it to switch both DC and AC loads within its specified electrical ratings. It supports DC load voltages up to 120 V and AC load voltages up to 230 V, with a rated output current of 5 A per channel.
The module provides two normally open (NO) relay outputs. Each channel operates independently, allowing the PLC to control separate electrical loads through the distributed I/O architecture.
The 6ES7132-4HB01-0AB0 is suitable for industrial control applications involving solenoid valves, contactors, indicator lights, and other compatible electrical loads. Its relay-based switching arrangement makes it particularly useful when the field circuit requires potential separation from the internal control system.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Type | Digital Output Relay Module |
| Model | 6ES7132-4HB01-0AB0 |
| Product Series | SIMATIC ET 200S |
| Module Type | Digital Electronic Module |
| Output Type | Relay |
| Number of Outputs | 2 |
| Contact Configuration | 2 NO (Normally Open) |
| Rated Supply Voltage | 24 V DC |
| DC Load Voltage | 24–120 V DC |
| AC Load Voltage | 24–230 V AC |
| Rated Output Current | 5 A per channel |
| Minimum Load Current | 8 mA |
| Maximum Switching Frequency (Resistive Load) | 2 Hz |
| Maximum Switching Frequency (Inductive Load) | 0.5 Hz |
| Maximum Switching Frequency (Lamp Load) | 2 Hz |
| Electrical Isolation | Between channels, supply voltage, and backplane bus |
| Short-Circuit Protection | Not provided |
| Diagnostics Function | Not supported |
| Status Indicators | Green LED per channel |
| Power Dissipation | Typically 0.6 W |
| Dimensions | 15 × 81 × 52 mm |
| Weight | 0.196 kg |
Product Features
- Two relay output channels: Provides two independent digital outputs for controlling external electrical loads.
- Normally open contacts: Uses NO relay contacts that close when the corresponding output is activated.
- AC and DC load compatibility: Supports DC loads up to 120 V and AC loads up to 230 V.
- 5 A output capacity: Each channel supports a rated current of up to 5 A within the specified operating conditions.
- Electrical isolation: Provides isolation between the output channels, supply voltage, and backplane bus.
- Individual status indication: Green LEDs indicate the switching status of each output channel.
- Configurable substitute values: Supports substitute output values when the CPU or master enters STOP mode.
- ET 200S integration: Connects to the SIMATIC ET 200S distributed I/O system through its backplane bus.
- External protection requirement: Relay outputs require appropriate external fuse protection.
Working Principle
The 6ES7132-4HB01-0AB0 converts digital control commands from the PLC into electrical switching actions through two internal relay contacts.
The basic signal path is:
SIMATIC PLC → ET 200S Backplane Bus → Relay Output Module → External Electrical Load
When the controller sends an activation command, the corresponding relay coil is energized. The normally open contact closes, completing the external load circuit and allowing current to flow to the connected device.
When the control command is removed, the relay returns to its normal state and the contact opens, interrupting the load circuit.
Each channel supports a maximum rated output current of 5 A. The module also supports different switching frequencies depending on the load type. Resistive and lamp loads can be switched at up to 2 Hz, while inductive loads are limited to 0.5 Hz.
Electrical isolation between the relay channels and the backplane bus helps separate field-side switching circuits from the internal communication system.
The relay outputs do not include integrated short-circuit protection. External 6 A fuses are required according to the module’s technical documentation. Appropriate protective measures are also necessary when switching inductive loads.
Role in the SIMATIC ET 200S Control Architecture
The 6ES7132-4HB01-0AB0 acts as the relay-based digital output interface in a SIMATIC ET 200S distributed I/O station.
The PLC executes the automation program and generates output commands. These commands are transferred through the ET 200S interface and backplane bus to the relay module, which switches the connected field devices.
A typical control arrangement is:
SIMATIC PLC → ET 200S Interface Module → Backplane Bus → 6ES7132-4HB01-0AB0 → Field Loads
| System Component | Function |
|---|---|
| SIMATIC PLC | Executes control logic and generates output commands |
| ET 200S Interface Module | Connects the distributed I/O station to the automation network |
| ET 200S Power Module | Supplies the required 24 V DC potential group |
| ET 200S Terminal Module | Provides electrical connections for the electronic module |
| 6ES7132-4HB01-0AB0 | Switches two external electrical loads through relay contacts |
| Field Wiring | Connects the relay outputs to external equipment |
| Electrical Loads | Receive switched AC or DC power from the output circuits |
The relay module handles the field-side switching operation, while the PLC and distributed I/O interface manage the control commands and data exchange.
Industrial Applications
| Application | Typical Use |
|---|---|
| Industrial Machinery | Switching external electrical equipment through relay contacts |
| Manufacturing Automation | Controlling discrete electrical loads |
| Solenoid Valve Control | Switching compatible AC or DC solenoid valves |
| Contactor Control | Operating external contactors through relay outputs |
| Indicator Systems | Controlling industrial signal lamps and indicators |
| Packaging Equipment | Switching auxiliary electrical devices |
| Material Handling | Controlling discrete equipment operations |
| Process Automation | Executing PLC-controlled switching functions |
| Industrial Control Cabinets | Providing relay-based output interfaces |
| Distributed I/O Systems | Expanding AC and DC switching capability near field equipment |
Installation and Maintenance
- Verify the module designation: Confirm that 6ES7132-4HB01-0AB0 is the required two-channel relay output module.
- Check load voltage: Verify that the connected loads operate within the supported DC and AC voltage ranges.
- Observe output current limits: Ensure that each channel remains within its rated 5 A output capacity.
- Install external protection: Provide the specified external 6 A fuse protection for the relay output circuits.
- Isolate electrical power: Disconnect the relevant power sources before removing or installing the module.
- Inspect terminal connections: Check the terminal module and field wiring for loose connections, corrosion, or damaged insulation.
- Verify module seating: Ensure that the electronic module is correctly installed in its designated ET 200S mounting position.
- Check contact assignments: Confirm the normally open contact terminal assignments against the module wiring diagram.
- Evaluate load characteristics: Consider the switching frequency limitations for resistive, inductive, and lamp loads.
- Test output operation: Activate each output separately and verify that the corresponding relay contact switches correctly.
- Monitor status indicators: Observe the green channel LEDs during commissioning and investigate unexpected switching behavior.
- Document maintenance activities: Record the module part number, wiring configuration, fuse ratings, connected loads, and test results.
Key Advantages
- Two independent relay output channels in one ET 200S module.
- Supports both AC and DC electrical loads.
- Provides a rated switching current of 5 A per channel.
- Uses normally open relay contacts for discrete load control.
- Provides electrical isolation between output circuits and the backplane bus.
- Integrates into the modular SIMATIC ET 200S distributed I/O architecture.
Technical FAQs
What is the difference between the 6ES7132-4HB01-0AB0 and a transistor output module?
The 6ES7132-4HB01-0AB0 uses electromechanical relay contacts rather than semiconductor switching components. This allows it to switch compatible AC and DC loads and provides electrical isolation through its relay contact arrangement.
Can both output channels switch 5 A simultaneously?
Each channel has a rated output current of 5 A, subject to the module’s thermal operating limits. The maximum channel current is reduced to 4 A at ambient temperatures up to 60°C. The connected load conditions must be evaluated before simultaneous operation.
Does the module have built-in short-circuit protection?
No. The relay outputs do not include integrated short-circuit protection. External 6 A fuse protection is required for the output circuits.
What happens to the relay outputs when the PLC enters STOP mode?
The module supports configurable substitute output values. Depending on the selected parameter, the outputs can switch to a configured substitute state or retain their last value when the CPU or master enters STOP mode.