West 4700+ Limit Controller

West 4700+ Limit Controller

When a process runs hot enough to damage equipment or put people at risk, the temperature controller isn’t the safeguard you want standing between normal operation and a runaway condition — a dedicated limit controller is. The West 4700+ watches the process independently and latches a relay the moment a set safety threshold is crossed, cutting power and requiring a deliberate manual reset before anything restarts.

How It Works

A 5A latching limit relay ships as standard, backed by non-latching alarm relays for early warning before the hard limit is reached. Auto-hardware detection sets up connected I/O automatically, and the controller can be configured from its own front panel or from a PC, so commissioning doesn’t mean re-learning a new interface for every job. Sensor break is detected in under two seconds, and the unit can be reconfigured in the field without opening it up or swapping jumpers.

Key Features

  • 5A latching limit relay with manual reset, standard
  • Auto-hardware detection for fast setup
  • Configurable via front panel or PC
  • Sensor break detection in under 2 seconds
  • FM, CE, UL, and ULC recognized

Applications

Used as an independent safety layer on ovens, furnaces, heat treatment equipment, and other high-temperature industrial processes where a runaway condition would damage equipment or create a hazard.

ModelWest 4700+
FunctionProgrammable safety limit control; latches a relay when a safe value is exceeded, requiring manual reset before the process can continue
DIN Size1/4 DIN; 96mm x 96mm panel, 92mm x 92mm (±0.5mm) cutout, 100mm depth
Input TypesThermocouple (J, K, C, R, S, T, B, L, N), 3-wire PT100 RTD, DC linear (0-20mA, 4-20mA, 0-10V ranges)
Input Accuracy±0.1% of input range ±1 LSD
Output Accuracy±0.25% at 250Ω
OutputsLatching limit relay (5A @ 240VAC), non-latching alarm relays (2A @ 240VAC), SSR driver, triac, or linear mA/V retransmit; optional 24VDC transmitter supply
DisplayDual LED display, 4-button operation, 4 LED indicators, selectable color combinations
Power Supply100-240V AC ±10%, 7.5VA
CertificationsFM, CE, UL, and ULC recognized
Operating Temperature0 to 55 °C (storage up to 80 °C)
Humidity20% to 95% RH, non-condensing
Enclosure RatingIP66 front panel (IEC), NEMA4X
Additional FeaturesSensor break detection under 2 seconds, adjustable hysteresis, optional Modbus/ASCII communications, field-reconfigurable without jumpers

Datasheet: West 4700+/6700+/8700+ Limit Controller Datasheet (PDF)

Manual: West 4700+/6700+/8700+ Concise Product Manual (PDF)

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