LTH Electronics HPT63, Operation Manual

Page: 20 / 68

3 Installation
12
Figure 5 : Relay contact connection
Depending on the load, a contact arc suppressor may be required to prevent
excessive electrical noise. To switch more than 5 Amps, use a slave relay.
Figure 6 : Slave relay connection
3.5 Digital Inputs
The digital inputs are used to externally initial a cleaning cycle or to take the unit off
line. These inputs are intended to be switched using a volt-free link, switch or relay.
Closing a contact initiates the action.
The connections to connector 2 are as follows:
Ground to pin 6 = clean
Ground to pin 4 = off line.