The Allen-Bradley 193-EC2CB serves as the primary 193-EC2CB Solid-State Overload Relay utilized to execute motor thermal overload modeling, internal ground fault sensing, and temperature circuit monitoring across DeviceNet platforms. The hardware processes phase current vectors and stator winding positive temperature coefficient (PTC) thermistor inputs, triggering programmed output contact state transitions when thermal limits or phase fault thresholds are exceeded.

Catalog Designation Breakdown

• 193: Bulletin catalog prefix for motor overload protection systems.

• EC: Electronic overload relay with DeviceNet communication capability (E3 / E3 Plus family).

• 2: Hardware series identifier defining dual Form C outputs and internal sensor options.

• CB: Hardware subcode indicating a 5 to 25 A adjustment range for compatibility with Bulletin 100-C09 through 100-C23 contactor profiles.

Technical Performance Matrix

Industrial Communication Integration and Velocity Synchronization

The integration with DeviceNet networks permits remote programming and real-time monitoring of critical diagnostic data registers. By deploying the device over Profinet / EtherNet/IP deterministic networks through bridging interfaces, engineers can streamline backplane bus communication velocity licenses across larger plant control architectures. Full firmware flash compatibility allows local operational profiles to stay matched with the controller assembly during changes in I/O density scaling, preventing communication latency and ensuring fast phase loss protection loops.

Logistics Packaging Inventory

• 1 Allen-Bradley 193-EC2CB Solid-State Overload Relay

• 1 Contactor Mechanical Connection Kit

• 1 DeviceNet Terminal Connector Block

Field Wiring and Installation Directives

• Contactor Integration Procedure

  Align and slide the overload terminal pins directly into the load-side screw clamps of the Bulletin 100-C09 to 100-C23 contactor. Torque all terminal screws to specification.

• Sensor Cable Separations

  Route the low-voltage 24 VDC discrete inputs and PTC thermistor lines in separate pathways from the high-voltage AC motor conductors to avoid capacitive noise coupling.

• Network Communication Hookup

  Connect the DeviceNet network tap to the front terminal header. Ensure a terminal resistor is placed at the end nodes of the physical network segment to prevent signal reflections.

Frequently Asked Questions

• Does this solid-state overload relay support direct hot-swapping under full motor load?

  No, disconnecting the control power or line connections while the motor is running is prohibited and can cause arcing and controller system faults.

• What physical action occurs when the PTC thermistor resistance rises above 3400 Ohm?

  The relay triggers an immediate trip of the Form C contacts or sets the Warning Status PTC bit based on configuration.

• How is the trip current adjusted on this model, and what is its standard trip threshold?

  Adjust the current using the front dial to match the motor rating; the default trip point occurs at 120% of the dial setting.

• Does this device require external current transformers to monitor currents within the 5 to 25 A range?

  No, the module features built-in internal current sensors that measure line currents directly up to its 25 A rating.

• What specific diagnostics are displayed on the dual LED status array?

  The TRIP/WARN indicator flashes codes for Ground Fault, Jam, or Phase Loss, while the Net LED indicates DeviceNet connection status.

• Can the Form C relay contacts operate using different voltage ratings?

  The control inputs operate on 24 VDC, but the auxiliary contacts must be wired within the limits specified in the technical manual.

• How is the internal ground fault detection circuit calibrated inside the software parameter list?

  Configure the trip delay and current limit values in the DeviceNet configuration software to align with your facility's ground fault limits.

• What is the response of the thermal warning bit when the motor approaches its trip state?

  The bit is set when the calculated thermal capacity utilization exceeds the programmed thermal warning level (0 to 100% TCU).