Technical Specifications
| Parameter Name | Value |
|---|---|
| Product Model | 193-EC2AD |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Product Series | Bulletin 193 E3 Plus |
| Product Type | Solid-State Electronic Overload Relay |
| Current Adjustment Range | 1 – 5 A (continuously adjustable) |
| Ground Fault Protection | Built-in internal zero-sequence ground fault sensor |
| Digital Inputs / Outputs | 4 Inputs / 2 Outputs |
| Logic Engine | DeviceLogix Series B |
| PTC Thermistor Input | Supported |
| Compatible Contactors | Bulletin 100-C30, C37, C43 |
| Mounting Type | Direct Contactor Mount |
| Protection Functions | Overload (inverse time), Phase Loss, Stall, Jam, Underload, Current Imbalance, Ground Fault, PTC Input |
| Short Circuit Rating | 100 kA SCCR @ 600V (with Class CC/J fuses) |
| Communication Expansion | Optional 193-DNENCAT / 193-DNENCATR (DeviceNet / EtherNet/IP side modules) |
| Weight | Approx. 0.45 – 0.98 kg |
| Protection Class | IP20 |
| Standards Compliance | EN 60947-4-1, EN 60947-8, EN 63000 (RoHS) |
| Certifications | cULus, CE, RCM, China CCC |
| Lifecycle Status | Discontinued (since 2019-10-31) – Replacement: 193-ESM-IG-30A-C55 |
Main Features and Advantages
The Allen-Bradley 193-EC2AD delivers precise, microprocessor-based protection that accurately models the motor’s thermal characteristics, eliminating the guesswork and environmental sensitivity associated with bimetallic relays. Its digital current adjustment allows users to set the exact Full Load Amperage (FLA) of the protected motor, while programmable trip classes accommodate various starting profiles, from high-inertia loads to normal-duty applications.
Built-in ground fault sensing is a standout feature of the Allen-Bradley 193-EC2AD, providing internal zero-sequence detection without requiring external current transformers . This enhances personnel safety and equipment protection by quickly detecting ground faults that could otherwise lead to motor damage or hazardous conditions. Additionally, the PTC thermistor input enables direct temperature monitoring of motor windings, offering an extra layer of protection against overheating.
The DeviceLogix Series B logic engine embedded in the Allen-Bradley 193-EC2AD enables local control logic execution, making it more than a simple protection device . This capability allows the relay to handle local control sequences, alarm management, and coordination with other devices in the system. In the event of network communication loss, the Allen-Bradley 193-EC2AD can revert to local control, ensuring process continuity or initiating safe shutdown procedures as required .
Diagnostic and monitoring capabilities further distinguish the Allen-Bradley 193-EC2AD from conventional relays. It provides real-time data on motor current, thermal capacity usage, and operational history, with the ability to log the past five trip events for troubleshooting purposes . The four inputs and two outputs offer flexible integration options, allowing connection of push buttons, pilot lights, or other control devices directly to the relay. When paired with optional communication modules such as the 193-DNENCAT for DeviceNet or the EtherNet/IP side mount module, the Allen-Bradley 193-EC2AD becomes a fully networked intelligent motor protection device, enabling centralized monitoring, configuration, and data collection across the facility .
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