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
Input 2 polarity: Normally closed
21 2120 2022 22 22
21 22 1
14 4B 12 11 2
HIGH / LOW
ALCO RANCO
3 3 21204 4
1 A4 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
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