Overview
The Allen-Bradley 592-EC1AC is an E3 series solid-state electronic overload relay designed for single-phase and three-phase squirrel-cage induction motor protection. This NEMA Size 0-2 device carries a current rating of 1-5 Amps and integrates DeviceNet communication for networked monitoring and diagnostics. The 592-EC1AC combines microprocessor-based overload sensing with configurable protection parameters, making it suitable for diverse industrial automation and OEM applications requiring adjustable trip-class protection.
Key Features
- Solid-state microprocessor-based overload protection for motors
- DeviceNet connectivity for remote monitoring and diagnostics over the network
- Adjustable trip setting (Class 5-30 protection curves available)
- Direct contactor mounting available on compatible NEMA starters
- Ground fault sensing capability with PTC thermistor monitoring support
- Ambient temperature compensation for stable operation across industrial environments
- Two discrete inputs and one output for integration with control logic
Technical Specifications
- Model Number: 592-EC1AC
- Series: E3 Electronic Overload Relay
- Current Rating: 1–5 Amps (adjustable)
- NEMA Size: 0–2
- Contactor Compatibility: Bulletin 500 direct mount
- Communication Protocol: DeviceNet (slave-only configuration)
- Input Signals: 2 discrete 24VDC inputs
- Output Contacts: 1 form contact (trip output)
- Trip Class Range: 5–30 (user-selectable)
- Operating Voltage: 24VDC (DeviceNet-powered)
- Phases Supported: Single-phase or three-phase
- Thermistor Input: PTC or standard thermistor supported
- Reset Type: Manual/automatic selectable
Typical Applications
- OEM motor control panels with networked diagnostics requirements
- Integrated DeviceNet systems requiring motor overload and fault visibility
- Facilities using Rockwell Automation ControlLogix or CompactLogix PLCs with DeviceNet modules
- Multi-motor production lines needing centralized monitoring
- Equipment requiring ground-fault detection and stall/jam protection
- Legacy system upgrades from older non-networked overload relays
Compatibility & Replacements
Compatible With
- Rockwell Automation Bulletin 500 Size 0–2 contactors (direct mount)
- DeviceNet master modules and controllers (CompactLogix, ControlLogix, RSNetWorx)
- Any Bulletin 500 motor starter assembly rated for NEMA Size 0–2
- 24VDC power supplies rated for DeviceNet trunk voltage
- PLC systems with DeviceNet scanner or communication adapter
Replaces / Drop-In Replacement For
- Other 592-EC1 series overload relays (AC/AT/BC/BT variants in 1-5A range)
- Legacy solid-state overload relays requiring DeviceNet retrofit
- Non-networked 592 series overload relays in equivalent current range
Works With
- RSNetWorx for DeviceNet (configuration and diagnostics)
- Allen-Bradley Data Highway Plus (if using gateway modules)
- DeviceNet explicit messaging and cyclic I/O messaging protocols
- Rockwell Automation Studio 5000 / RSLogix 5000 (via DeviceNet import)
- EDS files for 592-EC1 series available from Rockwell PCDC
