P70, P72, and P170 Series Controls for Low Pressure Applications Installation Instructions
5
Figure 6: Typical Wiring for 4-Wire, 2-Circuit
Switch (P70G and H Type Models)
Figure 7: Typical Wiring for DPST Switch
(P72A and B Type Models)
Table 5: Single Pressure Controls Switch Action, Low Events, High Events, Model Types, and Electrical
Rating Table References
Switch and Action
Low Event
High Event
Model Types
Single-Pole Single-Throw
(SPST) Open-Low
Cutout
(Opens Line to M1)
Cut In
(Closes Line to M1)
P70A, P70B, P170A
SPST Open-High
Cut In
(Closes Line to M1)
Cutout
(Opens Line to M1)
P70C, P70D, P170C, P170D
Single-Pole Double-Throw
(SPDT)
Opens 1 to 2 and
Closes 1 to 3
Closes 1 to 2 and
Opens 1 to 3
P70E
4-Wire, 2-Circuits,
1 N.O., 1 N.C.
Open-Low
Cutout
(Opens M2 to Line and
Closes M1 to Line)
Cut In
(Closes M2 to Line and
Opens M1 to Line)
P70G, P70H
4-Wire, 2-Circuits,
1 N.O., 1 N.C.
Open-High
Cut In
(Closes M2 to Line and
Opens M1 to Line)
Cutout
(Opens M2 to Line and
Closes M1 to Line)
P70J, P70K, P170K
Double-Pole Single-Throw
(DPST)
Open-Low
Cutout
(Opens M1 to Line and
M2 to Line)
Cut In
(Closes M1 to Line and
M2 to Line)
P72A, P72B
DPST
Open-High
Cut In
(Closes M1 to Line and
M2 to Line)
Cutout
(Opens M1 to Line and
M2 to Line)
P72C, P72D
