West 8170+ VMD & Temperature Single Loop Controller

The 8170+ single loop controller is part of the Plus series range and has 3-point stepping control designed specifically for open loop, valve motor drive (VMD) applications.

The 8170+ incorporates advanced tuning algorithms, with selectable pre-tune and self-tuning for easier setup. The self-tune also reduces output activity to an absolute minimum without compromising control quality, thereby reducing wear and tear on mechanical components such as valves, contactors and relays. In test, these controls have cut down valve oscillation from 30 to 40 times a minute to just a few. Pre-tune plus self-tuning has also been shown to get on control up to 3 times faster.

In addition to the VMD outputs, further output options exist which can be designated as outputs for alarms, 24 VDC transmitter power supply, retransmit process value or setpoint.

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Button Text

Additional information



Din Size

Dimensions and Size

96mm x 48mm x 100mm (HxWxD), 1/8 DIN

Primary Input Type

Universal (TC, RTD, DC linear V, DC linear mA/mV)

Other Inputs

1 digital or 1 Remote setpoint

Output Type

Relay, DC linear, SSd; Triac, 24V transmitter power supply

Max. Number of Outputs:


Control Type:

PID with TPSC (VMD), Manual, Alarm, Ramp to setpoint

Power Supply:

100–240V AC 50–60Hz

20-48V AC 50/60Hz

22-65 V DC


RS-485 serial (Modbus®)

Panel Sealing:

IEC IP66 (Behind panel protection is IP20), NEMA4X



Software Tools:

Plus Series Configurator