6HBWDOG1
Heartbeat Relay
Connect
.Monitor
.
Control
.
These products are to be used within control panels in hazardous locations. The enclosure shall be suitable
for this location. Hot-swapping is not for use in hazardous locations.
Note:
All information in this document applies to 6HBWDOG1 except where otherwise noted. Refer to
Red Lion website or online help systems for detailed product specifications and configuration settings.
1 General Information
1.1 Overview
The Red Lion heartbeat relay module is used as a failsafe system to monitor and shut down a PLC or RTU
based automation system in the event of a malfunction in the processor controlling the system. A secondary
safety check is the most economical way to achieve system safety shutdown.
This is accomplished is by powering the control system through the internal 10A rated relay built into the
watchdog module. Loss of processor control is detected by monitoring a discrete output signal designated as
the “Heartbeat” which toggles on and off under processor control. If the processor malfunctions, the heartbeat
will cease to toggle and the Heartbeat Watchdog Module will sense this failure and shut down the system by
opening the relay powering the system.
The Heartbeat Watchdog Module is designed for extreme reliability, using no microprocessor or other
programmable logic elements in its design. Using hard wired logic elements in place of CPU and memory
based circuitry removes the possibility of program bugs or memory failure disrupting the operation of the
module.
1.2 Specifications
1.2.1 General Specifications
Environmental
Power Supply voltage: 12-24 VDC
Max Power consumption: 60mA @ 12VDC
Operating Temperature: -40 to +80 C (-40 to +85 C Storage)
Humidity: 5 to 95% RH (non-condensing)
Standards Compliance
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 IEC61000-6-2 (EN61000-4-2,3,4,5,6,8); CE
Vibration: IEC60068-2-6
Shock: IEC60068-2-27
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
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