6HBWDOG1
Heartbeat Relay
Connect
.Monitor
.
Control
.
1.3 Getting Started with Red Lion Controls Hardware
Following these steps will make installation and start-up easier.
1.
Mount the Hardware
If you purchased individual components, consult
section 2
of this manual or other appropriate user manual
for information on installing them into an enclosure.
2.
Connect Power and Heartbeat input
Connect AC power cables from a suitable power source to the 24V DC power supply. The DC power
connections are then attached to the watchdog relay bases as outlined in
section 5
.
3.
Connect the PLC/instruments to the form C relay
Please refer to section 5 to see how wiring should be completed.
4.
Configure DIP switch settings
To configure the heartbeat timeout and boot delay set the dip switches on the side of the module according
to the instructions found in
section 3
of this document.
5.
Apply Power
Apply power to the watchdog relay power input and the Form C relay that will power the PLC/instruments.
This will power up the watchdog relay and the PLC/instruments, but since no heartbeat pulse is configured
the form C relay will be deactivated after the boot delay time expires.
6.
Press the bypass button to enable bypass mode.
Using a pen or a small screw driver press the bypass button on the front of the watchdog relay, once. The
boot/bypass LED will illuminate and remain ON until the button is pressed again. The bypass mode will
activate the form C relay so power will be applied to the PLC/instruments connected to the relay.
7.
Apply the heartbeat pulse from the SCADA system/Controller/RTU/PLC
The heartbeat is usually generated by adding logic into the device that the heartbeat relay will be
monitoring. For devices using an IEC61131-3 programming language a pulse can be created by adding a
“blink” function. Define how often the pulse will cycle and set the output to a physical discrete output. The
blink rate of the heartbeat pulse should be less (faster) than the heartbeat timeout configured in the dip
switches.
8.
Press the bypass button again to disable bypass mode.
Pressing the bypass button again will disable bypass mode. Since the heartbeat pulse is now present the
relay will remain active.
9.
If You Have Difficulty
If you experience startup trouble, go to the Getting Started icon in the I/O Tool Kit online help for some
troubleshooting tips or go to Red Lion website.
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: [email protected]
