6 • 82-5221
Emergency Stop Button
The emergency stop button on the front of the 82-5221 cuts power to the connected solenoid valve
when it is pushed.
Reset a pushed button by turning it clockwise.
Stack Light
The stack light installed on the top of the housing indicates the status of the solenoid valve’s power
line. When the light is green, power is being applied to the solenoid valve. When the light is red, power
is not being applied to the solenoid valve.
Internal Description
This section describes the internal components of the 82-5221.
Figure 2: Internal Component Location
Relay
A DPDT relay installed on the right side of the 82-5221 controls the stack light’s LED color and also
controls the power to the solenoid valve.
Power Supply
An AC/DC power supply installed on the left side of the 82-5221 converts user-supplied 115 VAC to
the 24 VDC that the 82-5221 requires for operation.
SOL ENOID
CO NTROL
TO ALARM
CO NTAC TS
Mounting Plate
Field Wiring
Terminal Strip
Fuse
1 NC 2
Power Supply
Relay
Emergency Stop
Button Connections
