Page: 5
Date: 06/09/2019
IN037 Rev 6 May 2019
T
HERMAL PROCESS EQUIPMENT SPECIALISTS
Volt free relay
Mains relay
4.4 Connections for a live relay controller
Refer to wiring diagram Fig 3 on page 7
Black 1
– Heater contactor Live
This is a live relay- the output lead connection
B1/B2 is 110/240 volts
Black 2 - Heater contactor Neutral
Black 3
– Alarm relay common
This relay is volt free and any voltage between
12 and 240v may be applied across it
Black 4
– Alarm relay output
Black 5
– Level control Live ( i.e. pump)
This is a live relay
– the output lead
connection B5, is 110/240 volts
Black 6
– not used (isolate)
5.
Description of controller display
The blue faceplate, as shown in Fig 2 on page 6, has two LED displays, six LED’s and three
push buttons. The larger of the two displays, referred to as the main display throughout this
document, displays the temperature of probe T1 normally situated in the process tank. The
small LED display located below the main display is principally used to display the temperature
set point. To the right of the main display are four LED’s. These indicate the various states of
temperature and liquid level being monitored by the controller.
5.1
Temperature LED’s
The ‘
Alarm
’ LED indicates when the process tank temperature exceeds the UPPER
temperature limit or is below the LOWER temperature limit. This alarm light is NOT
activated on standard Tankmaster controllers.
The
‘
Low
’ LED indicates when the process tank temperature is BELOW the set point
temperature. This is standard on all Tankmaster controllers.
