52
Installation
2582302_C_EN_1611
Nortec EL
5.8.3.10 Accessory Relay PCB Connections
The optional accessory relay PCB on the Nortec EL steam humidifier has the following four potential-
free relay contacts that can be used to control other accessory devices. Refer to
Figure 35
for the relevant
terminal contacts.
•
Flush A – this normally open (NO) relay can be wired to activate or deactivate the optional valve for
flushing the water supply line for steam cylinder A.
•
Flush B – this normally open (NO) relay can be wired to activate or deactivate the optional valve for
flushing the water supply line for steam cylinder B.
•
Fan Activate B – this normally open (NO) relay can be wired to activate or deactivate an external
fan of the AHU (air handling unit) connected to steam cylinder B.
•
Fan Activate A – this normally open (NO) relay can be wired to activate or deactivate an external fan
of the AHU connected to steam cylinder A.
Figure 35:
INTERNAL
EXTERNAL
4
3
2
1
2
1
Analog Out
Sensor Supply
Max. 60m
A
Fan A
Fan B
Flush B
Flush A
1 2 3 4 5 6 7 8 9 10
F1
100mA
J3 on Control Board
Accessory Relay PCB Connections (Optional)
The accessory relay PCB connects to the connector J3 on the Nortec EL control board.