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Omron K8DS-PM1 — Process / Temperature Controllers

Omron K8DS-PM1 Phase Monitor, 200-240VAC, DIN Rail

MPNK8DS-PM1
Active

Omron K8DS series, Phase Loss / Phase Sequence monitor, SPDT relay output, 200-240VAC supply, DIN rail mount.

$152.33 – $171.80Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

K8DS-PM1 — Identification
ParameterValue
SeriesK8DS
TypePhase Loss, Phase Sequence
K8DS-PM1 — Electrical
ParameterValue
Supply voltage200 ~ 240VAC
K8DS-PM1 — I/O
ParameterValue
Output typeRelay
K8DS-PM1 — Environmental
ParameterValue
Operating temperature-20°C~60°C
K8DS-PM1 — Mechanical
ParameterValue
Mounting typeDIN Rail
K8DS-PM1 — Other specifications
ParameterValue
CircuitSPDT (1 Form C)
Delay time0.1 Sec ~ 30 Sec
Contact rating @ voltage5A @ 250VAC

Product details

Three-phase line watchdog

The Omron K8DS-PM1 monitors a three-phase supply for phase loss and incorrect phase sequence — two fault conditions that stall motors, reverse rotation, or drop out contactors. It sits between the incoming mains and the motor starter, typically on a DIN rail inside the panel. The SPDT relay output switches 5 A at 250 VAC, so it can directly drop out a contactor coil or signal a PLC input.

Voltage and timing parameters

Supply voltage is 200-240 VAC. The adjustable delay time spans 0.1 to 30 seconds.

Panel fit and sourcing

Operating temperature range is -20°C to 60°C, covering most indoor electrical rooms without derating. Omron lists this as an active product.

Frequently asked questions

What is the difference between K8DS-PM1 and K8DS-PM2?

The K8DS-PM1 monitors phase loss and phase sequence. The K8DS-PM2 adds phase unbalance detection — it trips when the voltage difference between phases exceeds a set threshold, which the PM1 does not. Both share the same 17.5 mm DIN-rail footprint and SPDT relay output.

What voltage does the K8DS-PM1 support?

The supply voltage is 200-240 VAC. This powers the internal monitoring circuit and the relay coil; the monitored three-phase line is typically the same supply.

How do I set the delay time on the K8DS-PM1?

The front-panel potentiometer adjusts the delay from 0.1 to 30 seconds. Turn it fully counterclockwise for minimum delay (0.1 s) or clockwise for maximum (30 s). No tools needed — a small screwdriver adjusts the pot through the housing opening.

MPN
K8DS-PM1