The GE Fanuc 239-AN, also cataloged as the 239-AN Motor Protection Relay, operates as a dedicated hardware component for thermal and mechanical monitoring within industrial motor control loops. This hardware tracking device samples line metrics and switch inputs, executing separate start/run parameters and mechanical jam protection algorithms to isolate connected machine loads during electrical or structural overloads.
Hardware Specifications
Parameter
Specification
Model
239-AN
Brand
GE Fanuc (General Electric)
Series
239 Motor Protection Relay Series
Origin
United States / Canada
Weight
5 lbs
Dimensions
Standard compact panel-cutout 239 series profile
Operating Temp
Standard industrial motor control center limits
Power Consumption
Sourced via standard 239 series control voltage links
Ground Current Sampling
True RMS conversion executing 16 samples per cycle
Selectable Analog Output
One isolated loop: 4-20 mA, 0-1 mA, or 0-20 mA configurations
Communication Isolation
36 VDC isolated network barrier, active source implementation
Serial Transmission Speed
1200 to 12000 bps programmable communication baud rate
Discrete Input Parameter
Switch inputs duration: 100 ms minimum recognition window
Thermal Lockout Interval
Cool rate: 1 to 5000 min programmable, plus/minus 20 percent accuracy
Current Unbalance Window
5 to 100 percent / OFF threshold settings
Backplane Bus Communication Velocity and Processing
The motor protection card relies on high-density processing components to accelerate internal data distribution and calculation loops down to sub-millisecond windows. Rigorous firmware flash compatibility standards applied across the active logic core enable the unit to process true RMS calculations at 16 samples per cycle without introducing communication jitter or data bottlenecks. This execution velocity allows real-time thermal modeling curves and phase parameters to transmit over the 36 VDC isolated serial link at baud rates up to 12000 bps, maintaining deterministic signaling updates to external automation nodes.
