Valve Control Module
User’s Manual 3
Introduction
The Swagelok VCM uses a sophisticated control and monitoring system to operate up to six pneumatic stream
selecting valves or other discrete valves. This compact system reduces complicated cabling and minimizes
overall power consumption.
The solenoid pilot valves are connected to a common air supply inlet and a common exhaust or vent. Each pilot
valve is also connected to a dedicated outlet used to actuate an external, pneumatic stream selecting valve or
other discrete valve.
An indicator LED shows activation status for each pilot valve. Additionally ODVA-compliant DeviceNet indicators
show module and network status.
Each VCM contains a DeviceNet network interface. The interface includes power for energizing the electronics
inside the VCM and the communication signals, which allow a programmable logic controller (PLC) or similar
system controller to exchange digital data with the VCM. Using the DeviceNet network, each pilot valve can
be commanded to open a pneumatic flow path between the supply inlet and the associated outlet. The VCM
pilot valves are normally closed and will open a flow path between the exhaust and the associated outlet in this
position. See Fig. 1.
The VCM is available with proximity sensor inputs and various ingress protection options. Inputs connect to
proximity sensors integrated into the external valves actuated by the VCM. The VCM can be configured to
monitor the sensor inputs and return the sensor state as part of the DeviceNet poll message response.
Fig. 1 VCM Schematic
Optional
proximity
sensors
Pilot valve open.
Outlet connected
to inlet, IN.
Inlet
IN
Outlet
1
Outlet
2
Outlet
3
Outlet
4
Outlet
5
Outlet
6
Exhaust
EXH
Network interface
and module power
Pilot valve closed.
Outlet connected
to exhaust EXH.