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Omron K8AK-VS2 — Process / Temperature Controllers

Omron K8AK-VS2 Single-Phase Voltage Relay, 1–150 VAC/DC

MPNK8AK-VS2

Omron K8AK-VS2 single-phase voltage relay, 1 to 150 V AC/DC operating range, SPDT relay output, 24 VAC/DC or 100–240 VAC supply, DIN rail mount.

Omron K8AK-VS2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

K8AK-VS2 — Specifications
ParameterValue
WeightApprox. 150 g
IndicatorsPower (PWR): Green, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Reset methodAutomatic reset
Output relaysOne SPDT relay (NO/NC switched using DIP switch.)
Operating value100% operation at set value
Storage humidity25% to 85% (with no condensation)
Storage temperature-25 to 65°C (with no condensation or icing)
Power supply voltageIsolated power supply: 24 VAC/DC | 100 to 240 VAC
Ambient operating humidity25% to 85% (with no condensation)
Ambient operating temperature-20 to 60°C (with no condensation or icing)
Reset value setting range (HYS.)5% to 50% of operating value
Operating value setting range1 to 10 V AC/DC | 3 to 30 V AC/DC | 15 to 150 V AC/DC

Product details

Voltage sensing for panel protection

The K8AK-VS2 is a single-phase voltage relay that monitors AC or DC voltage levels and trips an SPDT relay when the monitored voltage deviates outside the set point. It covers three operating value ranges — 1–10 V, 3–30 V, and 15–150 V AC/DC — selected via the front-panel dial, so one unit handles low-signal and line-voltage sensing without a separate PT. Power supply is dual-range: 24 VAC/DC or 100–240 VAC, isolated from the measurement input. That means the relay can be wired into a 24 V control panel or a 230 V distribution board without swapping modules.

SPDT output with DIP-switch NO/NC selection

The single SPDT relay output is configured as normally-open or normally-closed via an onboard DIP switch — no rewiring needed to change the fail-safe state. Hysteresis is adjustable from 5% to 50% of the operating value, which prevents relay chatter on a slowly drifting voltage.

MPN
K8AK-VS2