Pressure switch wiring options
Single phase terminal
Single phase terminal
Single phase terminal
Three phase terminal
Three phase terminal
Three phase terminal
Combine high-low pressure controller (preset option)
Separate Low pressure
per AC input
controller
Separate Low pressure
per digital input
controller
Pressure controller equivalence
Control terminal
GND
Digital input 2
Digital input 1
Pressure controller:
Dual HP-LP
Pressure controller:
LP indep. AC input
Configuration
Configuration
Configuration
Pressure controller :
LP indep. dig. input
Input 2
: Low switch input
I
nput 2 polarity:
Normally closed
21
21
20
20
22
22
22
21
22
1
14
4
B
12
11
2
HIGH / LOW
ALCO
RANCO
3
3
21
20
4
4
1
A
4
C
A
C
FAN CONTROL
DANFOS/
PENN
DANFOS/
ALCO / RANCO
PENN
19
Tr
Tr
PE
PE
PE
21
21
21
20
20
20
22
22
22
25
LP
HP
LP
LP
HP
HP
