Lenze 13322174 EPM-S302.1B Safety Module
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Product Information
The Lenze 13322174 (Model EPM-S302.1B) is an integrated safety module designed for the Lenze 8400 inverter drive family, including the StateLine, HighLine, and TopLine series. Operating as a plug-in safety expansion board, this component enables drive-based functional safety capabilities—specifically Safe Torque Off (STO) and controlled deceleration via Safe Stop 1 (SS1)—without requiring an external fieldbus safety controller. Powered by a 24 V DC control supply, the EPM-S302.1B mounts directly into the option slot of the host drive backplane. It provides four dual-channel safe digital inputs and one safe diagnostic feedback output, with field connections brought out through removable X82 and X83 terminal blocks.
Interfacing with external safety devices occurs through the pluggable terminal strips X82 and X83, while internal communication relies on direct engagement with the host drive's backplane slot. Commissioning a replacement unit does not require software downloads or complex programming files, as module behavior is configured entirely in hardware using an onboard DIP switch bank. Selecting the SS1 delay time between 0.1 and 30 seconds is achieved simply by matching the switch configuration of the original module prior to installation. Once inserted securely into the host 8400 drive, the replacement unit is ready for immediate operation, with full diagnostics accessible through the drive's Keypad X400 or Lenze EASY Starter engineering software. ABC Industrial Parts can supply tested replacement modules to restore safe axis operation quickly.
Operational status and error conditions are indicated directly on the module front panel via three diagnostic LEDs labeled READY, SAFE / STO, and FAIL / ERROR. Detailed system diagnostics and error codes are logged directly into the host drive's fault memory. First-line troubleshooting for safety faults involves verifying the 24 V DC auxiliary supply voltage, checking dual-channel input symmetry and wiring integrity on terminal block X82, and ensuring that DIP switches are set to a valid functional combination while power is off. If an error code indicates an unresolvable internal hardware failure within the safety circuit board, field repair is not viable, making module replacement or repair through ABC Industrial Parts the recommended solution.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 13322174 |
| Model / Type | EPM-S302.1B |
| Component Type | Safety Module |
| Product Family | Inverter Drives 8400 |
| Compatible Drive Series | Lenze 8400 StateLine, HighLine, TopLine |
| Control Supply Voltage | 24 V DC |
| Safe Digital Inputs | 4 |
| Safe Digital Outputs | 1 |
| SS1 Delay Time Range | 0.1 to 30 s |
| Hardware Configuration | Onboard DIP switches |
| Diagnostic Indicators | READY, SAFE / STO, FAIL / ERROR LEDs |
| Terminal Connectors | Removable X82 and X83 terminal blocks |
Programming and Configuration
The EPM-S302.1B safety module employs direct hardware-based configuration, eliminating the requirement for dedicated safety software programming during installation. System functions and delay parameters are defined exclusively using an onboard DIP switch bank located on the module. This hardware design allows engineers to adjust the Safe Stop 1 (SS1) deceleration delay time in precise increments from 0.1 to 30 seconds.
To ensure reliable setup, DIP switch positions must be selected prior to applying power to the host drive, as toggling switches during live operation generates a configuration fault. When integrating the module into a drive system, parameter monitoring and status verification can be performed using Lenze EASY Starter software or the optional Keypad X400. Replacing a failed module requires setting the replacement unit's DIP switches to match the original unit, enabling rapid hardware swapping without requiring software re-parameterization.
Communication and System Integration
Integration with host inverters across the Lenze 8400 series—including StateLine, HighLine, and TopLine models—is accomplished through a direct backplane slot connection. The EPM-S302.1B interfaces internally with the drive control board, enabling execution of STO and SS1 safety functions directly on the drive's power stage.
External wiring connects directly to the module via two pluggable, removable terminal strips labeled X82 and X83. Terminal block X82 hosts four safe digital inputs for dual-channel safety signals such as emergency stop switches or safety door interlocks. Terminal block X83 handles the single safe feedback output, allowing the drive system to report its safety status back to higher-level controllers.
Diagnostics and Status Indication
The front panel of the EPM-S302.1B contains three status LEDs that provide visual feedback on module operation. The READY LED indicates that the control voltage is within limits and the system is operating normally. The SAFE / STO LED highlights an active safety function or Safe Torque Off state, while the FAIL / ERROR LED illuminates when an error condition is detected.
For deeper diagnostic analysis, the safety module transmits detailed status and error logs to the host 8400 inverter drive. Maintenance personnel can inspect the drive's fault memory buffer using the Keypad X400 control unit or Lenze EASY Starter engineering software to quickly locate channel mismatches, configuration errors, or hardware faults.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| READY | Indicates system ready status | |
| SAFE / STO | Indicates active safety function or Safe Torque Off state | |
| FAIL / ERROR | Indicates fault or error condition |
Replacement and Spare Part Considerations
When replacing a Lenze 13322174 (EPM-S302.1B) safety module, hardware setup accuracy is critical. Before installing the replacement, inspect the DIP switch positions on the existing unit and set the new module's switches to the exact same configuration to preserve configured SS1 delay times (0.1 to 30 seconds).
Power must be completely removed from the host drive before inserting or removing the module. Ensure the module is seated fully into the internal option slot until the locking tabs snap into place, establishing reliable backplane connectivity. Wiring transfers are streamlined by unplugging terminal blocks X82 and X83 from the faulty module and attaching them directly to the replacement without disconnecting individual conductors.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| 0x00B00001 | Safety Module Fault / General Internal Error | General internal hardware fault detected within safety module S302. | Internal circuit failure or component breakdown on safety module board. | Power cycle host drive. If fault persists, replace EPM-S302 module. |
| 0x00B00002 | Safety Input Channel Discrepancy Fault | State mismatch between dual safety input channels exceeding maximum allowed discrepancy time. | Faulty safety switch/sensor wiring, loose connection on X82, or defective external input contact. | Check wiring to terminals on X82. Inspect dual-channel safety contacts and verify simultaneous switching. |
| 0x00B00003 | Safety Module DIP Switch Configuration Error | Invalid DIP switch setting detected or DIP switch state changed during operation. | DIP switch set to an undefined combination or switch toggled while power was applied. | De-energize system, adjust DIP switches to valid functional combination according to manual, and re-apply power. |
| 0x00B00004 | Safety Module Communication / Interface Fault | Communication failure between host drive main board and safety module slot. | Safety module not seated properly in host drive slot, dirty edge contacts, or hardware failure. | Power off drive, re-seat EPM-S302 module securely in slot, ensure lock tabs engage, then power up. |
Frequently Asked Questions
What drive series are compatible with the Lenze 13322174 EPM-S302.1B safety module?
The EPM-S302.1B safety module is designed for direct backplane integration with Lenze 8400 StateLine, HighLine, and TopLine inverter drives.
How is the Safe Stop 1 (SS1) delay time configured on the EPM-S302.1B?
The SS1 delay time is configured directly in hardware using the onboard DIP switch bank on the module, allowing delay settings between 0.1 and 30 seconds without requiring software downloads.
Do I need programming software to replace a faulty EPM-S302.1B module?
No software programming is needed. You can replace the module by matching the DIP switch positions on the new unit to those of the original module and swapping the pluggable terminal blocks X82 and X83.
What do the LEDs on the front panel of the EPM-S302.1B indicate?
The module features three front panel LEDs: READY indicates standard operating status with active supply voltage, SAFE / STO signals an active safety function or STO state, and FAIL / ERROR indicates a fault condition.
What causes fault code 0x00B00003 and how can it be resolved?
Fault 0x00B00003 indicates an invalid DIP switch setting or a switch toggled while power was applied. To resolve it, de-energize the host drive, adjust the DIP switches to a valid functional setting, and re-apply power.
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