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Product Details

Watchdog Relay

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Red Lion's Watchdog Relay is the industry's only rugged hardware-based solution that reliably monitors and provides fail-safe shutdown of processes controlled by RTUs, PLCs and other automation devices. This industrial automation solution helps to proactively protect unmanned processes on a 24/7 basis.

Product Availability:   AGAINST PO, WITHIN 3-4 WEEKS


  •  Reliable, rugged design
  •  -40º C to 80º C operating temperature
  •  Class 1, Div II and ATEX hazardous location certifications
  •  Marine and offshore tested and/or verified to meet standards such as ABS, DNV No. 2.4 and Lloyds
  •  Fail-safe shutdown
  •  Monitors heartbeats from RTUs, PLCs and controllers
  •  Automatically powers down systems when malfunction occurs
  •  Adds a level of safety to the network

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Watchdog DATA Sheet 1



Watchdog Relay : -




Power supply voltage:   12 – 24 VDC
Operating temperature: -40? C to +80? C (-40? to +85? C Storage)
Humidity: 5 to 95% RH (non-condensing)

Electrical Safety UL 508, CSA C22.2/142;

IEC61010-1; CE

EMI Emissions FCC part 15, ICES-003, Class A; EN55022 IEC

61000-6-4; CE 

EMC Immunity IEC 61000-6-2 (EN61000-4-2,3,4,5,6,8); CE

Vibration: IEC 60068-2-6

Shock: IEC 60068-2-27

Hazardous locations (Class 1, Div II, Groups A, B, C, D) ISA

12.12.01, CSA C22.2/213, ATEX (Zone 2)

IEC 60079-0, -15 (pending)

Marine and offshore tested and/or verified to meet various marine and 

maritime standards such as ABS, DNV No. 2.4 and Lloyds

Packaging impact resistant Lexan® polycarbonate

Ingress protection: IP30

Dimensions: 1.00” (2.54 cm) width x 4.00” (10.16 cm) height x 3.72”

                     (9.45 cm) length 

Voltage range: 10 – 30 VDC 
Input polarity:  Sourcing
Input isolation:  150 Volts 
Guaranteed ON voltage: 9 VDC 
Guaranteed OFF voltage:  1.0 VDC 
Guaranteed OFF current:  1.0 mA DC
Input resistance (@24VDC):
Input current (@ 24 VDC)  10 mA 
Input protection: High Impedance with overvoltage protection 
Heartbeat frequency:
 1 – 50Hz* 
Heartbeat timeout (configurable): 1s to 200s*  1s to 200s* (* 1Hz may not work at fastest heartbeat timeout time of 1 second )
Relay type:  Form C
Maximum switching voltage: 30 VDC 2A@30 VDC
Warranty: 1 Year