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- Siemens
- 6ES7132-6HC50-0BU0
- Digital Output Module
- Germany
- 20 × 73 × 58 mm
- 0.055 kg
- Xiamen, China
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Product Overview
The Siemens 6ES7132-6HC50-0BU0 is a relay-type digital output module for the SIMATIC ET 200SP distributed I/O system. It is identified by Siemens as RQ 3x120VDC-230VAC/5A CO ST, featuring three electrically isolated changeover relay outputs.
The module allows a SIMATIC controller to switch external electrical loads through relay contacts. Each output uses a changeover contact consisting of one normally open contact and one normally closed contact, providing flexibility when controlling different types of industrial equipment.
The 6ES7132-6HC50-0BU0 supports switching voltages from 24 to 120 V DC and 24 to 230 V AC. Its maximum switching current is 5 A per channel with resistive loads, making it suitable for applications involving contactors, signaling devices, and other electrical loads within the specified switching limits.
As part of the ET 200SP system, the module communicates through the backplane bus and is installed on a compatible BaseUnit. It supports STEP 7 V16 or higher and can also be configured through the corresponding GSD file.
The module is particularly useful in distributed control cabinets where relay isolation is required between PLC control signals and external electrical circuits. Its three-channel configuration provides independent switching points within a compact I/O architecture.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES7132-6HC50-0BU0 |
| Product Series | SIMATIC ET 200SP |
| Product Type | Digital Output Module |
| Product Designation | RQ 3x120VDC-230VAC/5A CO ST |
| Output Type | Relay |
| Number of Digital Outputs | 3 |
| Relay Contact Type | Changeover Contact (CO) |
| Contact Configuration | Normally Open / Normally Closed |
| Electrical Isolation | Isolated Relay Contacts |
| Rated Relay Coil Voltage | 24 V DC |
| Rated Switching Voltage (DC) | 24–120 V DC |
| Rated Switching Voltage (AC) | 24–230 V AC |
| Maximum Switching Current | 5 A per Channel |
| Maximum Inductive Load Current | 2 A |
| Maximum Module Output Current | 15 A |
| Minimum Switching Current | 10 mA at 5 V DC |
| Maximum Switching Frequency (Resistive Load) | 2 Hz |
| Maximum Switching Frequency (Inductive Load) | 0.5 Hz |
| Rated Supply Voltage | 24 V DC |
| Permissible Supply Voltage | 19.2–28.8 V DC |
| Current Consumption | 40 mA rated, without load |
| Maximum Current Consumption | 55 mA |
| Relay Coil Current | 30 mA maximum for all relays |
| Power Loss | 1.6 W typical |
| Compatible BaseUnit | BU Type U0 |
| Color Code | CC20 |
| Configuration Software | STEP 7 V16 or Higher |
| Diagnostics | Supply Voltage and Module Diagnostics |
| Short-Circuit Protection | No |
| Safety Function Suitability | No |
| Protection / Isolation Test | 2,000 V DC |
| Operating Temperature | -30 to +60°C (horizontal installation) |
| Dimensions | 20 × 73 × 58 mm |
| Weight | 0.055 kg |
Product Features
- Three Relay Outputs: Provides three independent digital relay output channels for external load switching.
- Changeover Contacts: Each channel features normally open and normally closed contacts for flexible circuit configuration.
- Wide Switching Voltage Range: Supports 24–120 V DC and 24–230 V AC switching applications.
- 5 A Resistive Load Capacity: Supports a maximum switching current of 5 A per channel with resistive loads.
- Electrical Isolation: Provides galvanic separation between relay output channels and the ET 200SP backplane bus.
- 24 V DC Relay Coil Supply: Uses a 24 V DC rated relay coil supply.
- Module Diagnostics: Includes supply voltage monitoring and module diagnostic indication.
- LED Status Display: Provides PWR, channel status, and DIAG indicators for operational monitoring.
- Flexible Configuration: Supports STEP 7 V16 or higher and GSD-based configuration.
- Compact ET 200SP Integration: Uses a compatible BU type U0 BaseUnit for distributed I/O installation.
Product Working Principle
The Siemens 6ES7132-6HC50-0BU0 converts digital control commands from the ET 200SP controller system into electrical switching actions through three relay output channels.
When the controller activates an output, the module energizes the corresponding relay coil using its 24 V DC supply. The electromagnetic force changes the relay contact position, connecting the common terminal to either the normally open or normally closed contact.
This switching action allows external circuits to be controlled independently of the PLC’s internal logic voltage.
For example, a controller can activate one channel to operate a contactor coil while using another channel for an alarm circuit. The third channel can be assigned to a separate switching function, provided the connected load meets the module’s electrical ratings.
A simplified control arrangement is:
SIMATIC Controller → ET 200SP Backplane Bus → 6ES7132-6HC50-0BU0 → Relay Contacts → External Electrical Loads
Each relay output supports changeover switching. This allows the module to control circuits that require either normally open or normally closed contact operation.
The relay contacts are electrically isolated, helping separate external load circuits from the internal controller electronics. This is particularly useful when switching different external voltage levels within the module’s specified operating limits.
The module also provides diagnostic information for supply voltage monitoring and general module status. Its PWR, channel status, and DIAG LEDs help maintenance personnel identify operating conditions during commissioning and troubleshooting.
Because the outputs use mechanical relays, switching frequency and electrical load characteristics must be considered. Inductive loads require particular attention to external suppression and protection measures.
Role in Siemens SIMATIC ET 200SP Control Architecture
Within the SIMATIC ET 200SP architecture, the 6ES7132-6HC50-0BU0 functions as a distributed relay output module.
The higher-level PLC executes the control program and sends output commands through the ET 200SP communication interface. These commands are transferred across the station backplane bus to the relay module.
The module then operates the corresponding relay contacts to switch external equipment.
A typical control arrangement is:
SIMATIC PLC → ET 200SP Interface Module → Backplane Bus → 6ES7132-6HC50-0BU0 → Field Loads
| System Component | Function |
|---|---|
| SIMATIC S7-1200 / S7-1500 PLC | Executes automation logic |
| ET 200SP Interface Module | Connects the distributed I/O station to the controller network |
| 6ES7132-6HC50-0BU0 | Provides three isolated relay outputs |
| ET 200SP BaseUnit BU Type U0 | Provides the module mounting and electrical connection |
| 24 V DC Power Supply | Supplies the relay coil and module circuits |
| Contactors | Switch external power circuits |
| Alarm Devices | Provide audible or visual status indication |
| Motor Control Circuits | Receive relay-based switching commands |
| Field Wiring | Connects relay contacts to external loads |
The module is suitable for distributed switching applications where relay contacts are preferred over semiconductor output circuits.
Industrial Applications
The 6ES7132-6HC50-0BU0 is suitable for industrial automation systems requiring isolated relay switching through a SIMATIC ET 200SP distributed I/O station.
| Industrial Application | Typical Use |
|---|---|
| Manufacturing Automation | Switching contactors and auxiliary equipment |
| Packaging Machinery | Operating machine actuators and electrical interlocks |
| Conveyor Systems | Controlling motor contactor circuits |
| Material Handling | Switching external control devices |
| Water Treatment | Operating pumps and auxiliary equipment through relay circuits |
| HVAC Automation | Switching fans, dampers, and control relays |
| Chemical Processing | Controlling external electrical devices |
| Power Distribution | Switching auxiliary electrical circuits |
| Industrial Assembly Lines | Controlling machine status and switching functions |
| Building Automation | Operating compatible electrical loads |
Installation and Maintenance
- Verify the Module Number: Confirm that 6ES7132-6HC50-0BU0 matches the project hardware configuration and required relay output specifications.
- Check BaseUnit Compatibility: Use a compatible BU type U0 BaseUnit and verify the mechanical coding arrangement before installation.
- Inspect the Module: Check the housing, connector contacts, and terminal interfaces for visible damage.
- Isolate the Power Supply: Disconnect the relevant power supplies before installing or removing the module.
- Mount the Module: Install the module on the designated ET 200SP BaseUnit and ensure that it is securely seated.
- Verify Supply Voltage: Confirm that the 24 V DC supply is within the specified 19.2–28.8 V DC operating range.
- Check Relay Output Wiring: Connect the common, normally open, and normally closed terminals according to the module wiring diagram.
- Verify Load Ratings: Ensure that the connected loads do not exceed the permitted switching current and voltage ratings.
- Provide External Protection: Install the required external miniature fuse protection for relay output circuits according to Siemens specifications.
- Configure the Module: Configure the module in STEP 7 V16 or higher, or use the applicable GSD configuration.
- Perform Functional Testing: Test each relay output individually and verify that the contact switching behavior matches the PLC program.
- Inspect During Maintenance: Check terminal tightness, relay operation, LED indications, and external protection devices during scheduled maintenance.
When switching inductive loads, use suitable external suppression components where required. Relay contact wear should also be considered in applications involving frequent switching.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6ES7132-6HC50-0BU0 | Three-Channel Relay Digital Output Module |
| Siemens ET 200SP BU Type U0 | Compatible BaseUnit |
| Siemens ET 200SP Interface Module | Distributed I/O Communication |
| Siemens 6ES7131 Series | ET 200SP Digital Input Modules |
| Siemens 6ES7132 Series | ET 200SP Digital Output Modules |
| Siemens 6ES7134 Series | ET 200SP Analog Input Modules |
| Siemens 6ES7135 Series | ET 200SP Analog Output Modules |
| Siemens SITOP Power Supply | 24 V DC Power Supply |
Recommended Related Models
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Siemens 6ES7132-6BH00-0AA0 | Digital Output Module | ET 200SP transistor output |
| Siemens 6ES7132-6BH01-0BA0 | Digital Output Module | ET 200SP digital switching |
| Siemens 6ES7132-6FD00-0BB1 | Digital Output Module | ET 200SP digital output |
| Siemens 6ES7132-6FD00-0CU0 | Digital Output Module | ET 200SP digital output |
| Siemens 6ES7132-6GD51-0BA0 | Signal Relay Module | ET 200SP relay switching |
| Siemens 6ES7131-6BH01-0BA0 | Digital Input Module | ET 200SP digital signal acquisition |
Key Advantages
- Three isolated relay output channels.
- Changeover contacts for NO and NC circuit configurations.
- Supports AC and DC switching applications.
- Maximum 5 A resistive switching current per channel.
- Compatible with ET 200SP distributed I/O architecture.
- Supply voltage monitoring and module diagnostics.
- Suitable for external contactor and auxiliary circuit control.
- Configurable through STEP 7 V16 or higher.
Technical FAQs
1. What does RQ 3x120VDC-230VAC/5A CO ST mean?
RQ identifies the relay output module, 3 indicates three output channels, 120 VDC and 230 VAC specify the supported DC and AC switching voltage ranges, 5A indicates the maximum resistive switching current per channel, and CO refers to changeover contacts.
2. Does the 6ES7132-6HC50-0BU0 provide normally open and normally closed contacts?
Yes. Each of its three relay outputs uses a changeover contact, providing one normally open and one normally closed contact alongside the common terminal.
3. Which BaseUnit is compatible with the 6ES7132-6HC50-0BU0?
Siemens specifies BU type U0 as the compatible BaseUnit type. The BaseUnit and terminal arrangement should be checked against the ET 200SP station design before installation.
4. Can the 6ES7132-6HC50-0BU0 switch inductive loads at 5 A?
No. The maximum specified switching current for inductive loads is 2 A, compared with 5 A for resistive loads. The actual load characteristics and required external protection must be considered when selecting the module.