Temperature Monitoring Relay K8AB-TH is a temperature alarm monitoring relay that can be set by DIP switch. It supports high-precision PT100 or thermocouple input and has overtemperature alarm, fault locking and switch output functions.
The K8AB-TH is a compact temperature‑monitoring relay designed for alarm and monitoring of abnormal temperatures. It supports thermocouple or Pt100 sensor inputs, offers selectable non‑fail‑safe or fail‑safe relay output, and includes LED status indicators.
The manual covers product features, electrical specifications, wiring diagrams, DIP‑switch configuration, operation modes, dimensions, mounting, precautions, and warranty information, helping users safely install and use the relay in industrial automation applications.
| Power supply voltage | 100‑240 VAC 50/60 Hz or 24 VAC/24 VDC |
|---|---|
| Output relay rating | One SPDT relay, 3 A at 250 VAC (resistive load) |
| Sensor inputs | Thermocouple K, J, T, E; Pt100 |
| Ambient operating temperature | ‑10 °C to 55 °C (no condensation or icing) |
| Power consumption | 5 VA max. |
| Mechanical life | 10,000,000 operations |
| Electrical life | Make: 50,000 times, Break: 30,000 times |
| Weight | 130 g |
| Dimensions | 22.5 × 100 × 90 mm (W × D × H) |
| Degree of protection | IP20 |
It can be powered from 100‑240 VAC 50/60 Hz or from 24 VAC/24 VDC.
The output is a single‑pole‑double‑throw relay rated for 3 A at 250 VAC (resistive load).
The relay is rated for 10 million mechanical operations.
The green PWR LED indicates that power is on, while the red ALM LED indicates an alarm condition or error.