Swagelok VCM User manual

Digital Valve
Control Module
(VCM)
This manual contains important information for the safe and
effective operation of the Swagelok®digital valve control
module. Users should read and understand its contents before
operating the valve control module.
User’s Manual
www.swagelok.com

2Valve Control Module User’s Manual
Safety
Signal Words Used in this Manual
NOTICE Statements that indicate a hazardous situation which, if not avoided, could result in damage to the
equipment or other property.
Contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Product Information . . . . . . . . . . . . . . . . . . . . . . 4
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Drawing . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Air Supply Quality . . . . . . . . . . . . . . . . . . . . . . 7
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . .8
DeviceNet™ Network Cable . . . . . . . . . . . . . . . . . 8
Tubing Connections . . . . . . . . . . . . . . . . . . . . . 9
Proximity Sensor . . . . . . . . . . . . . . . . . . . . . . 10
Terminal Strip (SS-VCM-D-6-2). . . . . . . . . . . . . 10
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electronic Data Sheet (EDS) . . . . . . . . . . . . . . . . 12
General Tab . . . . . . . . . . . . . . . . . . . . . . . 13
Parameter Tab . . . . . . . . . . . . . . . . . . . . . 13
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Commanding the VCM . . . . . . . . . . . . . . . . . . 16
Response from the VCM . . . . . . . . . . . . . . . . . . 16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 18
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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 ow path between the supply inlet and the associated outlet. The VCM
pilot valves are normally closed and will open a ow 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 congured 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.

4Valve Control Module User’s Manual
Product Information
Fig. 2 MS-VCMD-6-2
Mounting holes
Grounding lug
Interface cover
Valve #1 LED
Network LED
Module LED
M12 Network
Connector Plug
Exhaust
Cable gland
Mounting holes
Inlet
Outlets

Valve Control Module User’s Manual 5
Specifications
Power
Voltage 24 V (dc), nominal
Current < 310 mA (dc) at 24 V (dc)
Wattage < 7.5 W at 24 V (dc)
Temperature
Operating (Ambient) Minimum 23°F (–5°C)
Maximum 122°F (50°C)
Media Minimum 23°F (–5°C)
Maximum 122°F (50°C)
Storage Minimum –4°F (–20°C)
Maximum 140°F (60°C)
Weight 3.5 lb (1.6 kg)
Ingress Protection IP64
Inlet Air
Pressure 40 to 116 psig
(1.6 to 7.9 bar)
Air Quality Filtered compressed
air, lubricated or
unlubricated, grade of
filtration 40 μm
Entity Parameters See control drawing VCM-DN-0011-
SCHEDULE on page 6.
Supported
Communication
Baud Rates
Auto-baud function, allowing the device
to detect the speed of network trafc. It is
compatible with 125, 250, and 500 kbaud
rates.
Note: Before installing the VCM in a hazardous location, review the control drawing on page 6.
This will help ensure all electrical connections to and from the VCM comply with safety
requirements. For an electronic copy of this document, see Swagelok.com

6Valve Control Module User’s Manual
Control Drawing
Fig. 3 VCM-DN-0011 SCHEDULE
4
5
3 2
1
1, 4, 7, 11, 14, 17: Sensor V+ 2, 5, 8, 12, 15, 18: Sensor Response 3, 6, 9, 13, 16, 19: Sensor V- 10, 20: No Connect
Notes: (1) The Entity Concept allows interconnection of nonincendive apparatus with associated apparatus not specifically examined in combination as a system when the approved values of Voc and Isc of the associated apparatus are less than or equal to Vmax and Imax of the nonincendive apparatus and the approved values of Ca and La of the associated apparatus are greater than Ci+Ccable and Li+Lcable respectively for the nonincendive apparatus. (2) Capacitance and inductance of the field wiring from the nonincendive equipment to the associated apparatus shall be calculated and must be included in the system calculations as shown in Table 1. Cable capacitance, Ccable, plus nonincendive equipment capacitance, Ci, must be less than the marked capacitance (Lcable, Li and La or Lo, respectively). Where the cable capacitance per foot are not known, the following values shall be used: Ccable = 60 pF/ft., Lcable = 0.2
µ
H/ft.
TABLE 1:
TABLE 2:
TABLE 3:
Nonincendive Equipment
Associated Apparatus
Sensor Interface
V max (or Ui)
≥
Voc (or Uo) Voc (or Uo)
I max (or Ii)
≥
Isc (or lo) Isc (or lo)
P max (or Pi)
≥
Po Po
Ci
≤
Ca (or Co) Ca (or Co)
Li
≤
La (or Lo) La (or Lo)
If Po of the associated apparatus is not known, it may be calculated using the formula: Po = (Voc * Isc)/4 = (Uo * Io)/4. (3) Associated apparatus must be installed in accordance with its manufacturer's control drawing and Article 504 of the National Electrical Code (ANSI/NFPA 70), the Canadian Electrical Code, or other local installation codes, as applicable. The resistance of the ground path must be less than 1 ohm. (4) When required by the manufacturer's control drawing, the associated apparatus must be connected to a suitable ground electrode per the National Electrical Code (ANSI/NFPA 70), the Canadian Electrical Code, or other local installation codes, as applicable. The resistance of the ground path must be less than 1 ohm. (5) The VCM is powered by two separate nonincendive circuits, designated Power and Signal as indicated in Tables 1, 2 and 3. Cable and wiring for these two circuits must maintain the separations for different nonincendive circuits required by Article 504 of the National Electrical Code (ANSI/NFPA 70), ISA RP12.6 for installing nonincendive circuits, or other local codes, as applicable. (6) Associated apparatus must not be used in combination unless permitted by associated apparatus certification. (7) WARNING: Substitution of components may impair safety. (8) The ambient operating (Tamb) range for this product is -5C to 50C. (9)
Each unit must be connected to an IP64 or higher rated connector or IP rating will be void.
HAZARDOUS LOCATION
Class I, Div. 2, Groups C, D
Any associated apparatus power supply with Entity Concept Parameters (1) appropriate for connection to an nonincendive device with Entity concept parameters listed in Table 1. Any nonincendive or associated apparatus communication controller with Entity Concept parameters (1) (Vmax, Imax, Ci, Li) appropriate for connections to nonincendive devices with Entity Concept parameters listed in Table 1.
NON-HAZARDOUS LOCATION
CONTROL EQUIPMENT
NONINCENDIVE FIELD WIRING - POWER CIRCUIT (PINS 2,3)
NONINCENDIVE FIELD/ ASSOCIATED APPARATUS WIRING - SIGNAL CIRCUIT (PINS 4,5)
Field Wiring Diagram
1 - Drain bare 2 - V+ red 3 - V- black 4 - CAN_H white 5 - CAN_L blue
WARNING: ANY CHANGES MADE TO THIS DOCUMENT MUST BE REVIEWED AND APPROVED BY SWAGELOK COMPLIANCE DPT
MATERIAL: NA
DESCRIPTION: SWAGELOK DEVICENET PTX CONTROL DRAWING
Male
Sensor Interface
DWG. NO.
VCM-DN-0011-SCHEDULE
TITLE
DRAWN BY
CHECK/APR BY
JEK
DWG. NO.
VCM-DN-0011-SCHEDULE
THIS PRINT IS THE EXCLUSIVE PROPERTY OF SWAGELOK COMPANY. IT MUST BE RETURNED ON REQUEST ALONG WITH ANY DOCUMENTS CONTAINING INFORMATION OBTAINED FROM THIS PRINT. NEITHER THIS PRINT NOR ANY PART OF IT NOR ANY INFORMATION CONCERNING IT MAY BE COPIED, DISCLOSED TO OTHERS OR USED FOR ANY PURPOSE EXCEPT IN FURTHERANCE OF YOUR BUSINESS WITH SWAGELOK. THE PARTS REFERRED TO ON THIS PRINT MAY BE THE SUBJECT OF PATENTS AND/OR PENDING APPLICATIONS AND MAY NOT BE MANUFACTURED WITHOUT PERMISSION FROM SWAGELOK COMPANY.
SCALE
NONE
REV.
-
SHEET
1 of 1
REVISIONS
TOLERANCE ON ENGLISH DIMENSIONS
UNLESS OTHERWISE SPECIFIED
7
6
5
4
3
2
1
D
C
B
A
8
8
7
6
5
4
3
2
1
A B
C
D
APPROVAL/SCHEDULE DRAWING
.XX
.031
.XXX
.015
ANGLES
1 DEGREE
DCN
REV.
Jul-9-12
DATE
DATE
MJR
Jul-9-12
-- DIMENSIONS ARE INCHES NEXT TO [MILLIMETERS].
© Swagelok Company All Rights Reserved

Valve Control Module User’s Manual 7
Installation
Mounting
The VCM can be mounted using the mounting holes located on the feet of the enclosure. Mounting holes on
the feet of the device are 0.22 inches (5.6 mm) in diameter, and can accommodate a #10 or M5 machine screw.
Tighten the screws to wrench tight.
Grounding
The VCM must be grounded while in operation. This unit can be grounded either through the surface to which
it is mounted (in the event that the VCM is mounted to a grounded plate), or a grounding wire attached to the
ground lug on the side of the VCM. The ground lug is a #10-32 thread and can accommodate a #10 ring lug
connector. The grounding wire should be at least 12 AWG wire. The total resistance between the VCM and
ground should be less than 1 Ω.
Air Supply Quality
The supply air must be ltered to ensure that particles larger than 40 μm have been removed. The air can be
lubricated or unlubricated.
Fig. 4 Mounting Diagram
2.55
(64.8)
5.33
(140)
1.76
(44.7)
2.33
(59.2)
3.26
(82.8)
3.21
(81.5)
6.17
(157)
3.70
(94.0)
1.76
(44.7)

8Valve Control Module User’s Manual
Power Supply
Power supply voltage must be within the range of the DeviceNet standard, which states:
24 volts ±1 % or adjustable to 0.2 %. Use of a lower voltage network power supply will decrease the reliability of
the network and may make it inoperable. Swagelok validated the performance of the VCM operating at 11, 24,
and 28 V (dc).
Note: Due to cable lengths and other devices operating on a network, the supply voltage at the device may not
be the same as at the power supply.
Hazardous Location Power Supply
It is required that a Class 2 power supply be used when the VCM is used in Class 1 Division 2 hazardous
locations. Class 2 power supplies have a maximum power outlet of 100 W.
DeviceNet Network Cable
Cable Length
DeviceNet network cable lengths are dened in ODVA’s DeviceNet Planning and Installation Manual, chapter1,
www.odva.org. Using cable lengths longer than those recommended can result in degradation of signal
integrity and decrease of supply voltage.
Hazardous Location Cable Length
To use the cable in a hazardous location, the total inductance and capacitance of the network must be below
the values set by the power supply being used. The total value can be determined by adding together the
inductance and capacitance values of the devices on the network along with that of the cable.
The Swagelok VCM adds 0 µH and 0 µF to the network.
Cable parameters can be determined from the manufacturer’s datasheet. Assume values of 60 pF/ft and
0.2µH/ft when that information is not available.
Cable Bend Radius
The DeviceNet network cable should not be bent too tightly, as this causes excess strain on the cable and the
attachment point on the device. After the cable has been installed, the bend radius can be adjusted as long as
it is not smaller than its xed radius. Typical cables and their bend radii are presented in the table below. These
values may change based on the manufacturer’s recommendations.
Cable Bend Radii
Cable Type Nominal Cable Dia Installation Bend Radius Fixed Bend Radius
Thick Cable 0.41 in. (10.4 mm) 8.20 in. (210 mm) 2.87 in. (73.0 mm)
Thin Cable 0.24 in. (6.1 mm) 4.80 in. (122 mm) 1.70 in. (43.0 mm)
Connecting the Cable
Connect the micro M12 connector end of the network cable to the network interface plug on the VCM. Connect
the opposite end to the system network.
Tubing Connections
1
2 3
4
5
V-V+
CAN_L
CAN_H
Mechanical key
Drain
V+ = 24 V (dc) supply
V–= Ground
CAN_H = High signal of CAN differential
signal
CAN_L = Low signal of the CAN differential
signal
Drain = Cable shield, ground at the power
supply end
Fig. 5 M12 Female Connector End

Valve Control Module User’s Manual 9
The VCM accommodates #10-32 thread connections (ex. face sealed push-to-connect) for 1/8 in. exible
tubing. Face sealed push-to-connects should be installed according to the manufacturer’s instructions.
1. Connect supply air to the inlet.
Notice: Do not exceed 116 psig (7.9 bar).
2. Connect system valves to any of the numbered outlets. It is not necessary to cap unused outlets.
3. Connect the exhaust to a system vent line.
Fig. 6 #10-32 Push-to-Connect Fittings
Fig. 7 VCM with #10-32 Push-to-Connect Fittings
Inlet
Numbered outlets
Exhaust
Max OD = 0.35 in. (8.9 mm)

10 Valve Control Module User’s Manual
Proximity Sensor
The Swagelok VCM model number SS-VCM-D-6-2 is designed to work with the Bi1-EG05-AP6X proximity
sensor manufactured by Turck Inc. These sensors can be added as an option to the applicable Swagelok valve
at the time of purchase. An alternate option is a compatible three-wire, 12 V (dc), PNP proximity sensor.
Note: The SS-VCM-D-6-0 model does not have any capability to interface with proximity sensors.
Terminal Strip with Sealed Enclosure, IP64 (SS-VCM-D-6-2)
For the SS-VCM-D-6-2 model, the proximity sensor wires must be passed through the enclosure before
attachment to the proximity sensor terminal strip.
1. Use a Number 1 Phillips screwdriver to remove the six enclosure mounting screws. Remove the enclosure
and gasket.
2. Use an 8 mm wrench to loosen a cable gland nut.
Note: Use a backup wrench to ensure the tting body does not loosen from the enclosure.
3. Pass the sensor wire through the cable gland body and enclosure gasket.
Note: In order to seal properly, the cable diameter must be between 0.080 and 0.13 inch (2.0 to 3.3 mm).
Fig. 9 Loosen a Cable Gland Nut
Backup wrench
8 mm wrench
Fig. 8 Remove Enclosure
Mounting screws
Enclosure
Gasket
Washers

Valve Control Module User’s Manual 11
4. Connect each wire to the appropriate input on the terminal strip. Connect a brown, a black, and a blue wire
for each valve to be controlled by the VCM.
a. Loosen the set screw for each wire.
b. Insert the wire in the appropriate location. See Fig. 10.
c. Tighten the set screw.
Note: Put a strain relief in place to prevent the wires from being accidentally pulled out.
5. Repeat steps 2 through 4 for each proximity sensor to be attached to the VCM.
6. Place the enclosure and gasket against the VCM body, lining up both with the mounting holes.
7. Tighten each cable gland nut on the enclosure to 1.00 in.·lb (0.11 N·m) to maintain IP rating.
8. Insert the six enclosure mounting screws with PTFE washers. Tighten the screws hand-tight in the pattern
shown.
Fig. 10 Connect Wire to Terminal Strip
Brown Black
Blue
Note: Terminal inputs 10 and 20
are no connects.
1
2
5
3
4
6
Fig. 11 Tighten Enclosure Screws
Set
screw

12 Valve Control Module User’s Manual
9. Cap any unused cable glands using the caps and O-rings provided to maintain IP rating.
10. Remove the cable gland nut using a 8 mm wrench. Slide an O-ring onto the cable gland body until it is
seated at the base of the threads.
11. Thread on a cap and tighten to 1.00 in.·lb (0.11 N·m) using a 10 mm wrench.
Setup
Notice: The VCM must be disconnected from the system while performing setup functions.
Electronic Data Sheet (EDS)
1. Download the electronic data sheet (EDS) le from www.swagelok.com.
Note: Altering the EDS in any way voids the product warranty.
2. Open your network conguration tool, such as RSNetWorx™ for DeviceNet.
3. Register the EDS using the network conguration tool.
4. Connect the VCM to the network.
5. Scan the network for the VCM, and click on the device.
6. Use the network conguration tool to set the elds.
Fig 12 Cap and O-ring Assembly

Valve Control Module User’s Manual 13
General Tab
Device Address (MAC ID)
The VCM will have a factory set address of 63 when initially powered on. Addresses between 0 and 63 are
valid DeviceNet addresses. Do not duplicate addresses. Duplicate addresses will cause the devices at that
address to be unable to communicate with the network. As noted, new devices will be set to address 63, so it is
recommended to leave that address open to accommodate new hardware.
Assign higher priority devices a low network address as the lowest network address will be given priority during
network arbitration.
Parameter Tab
These elds can be set for each of the attached valves. Select the valve to edit and then the desired eld(s).
Fig 14 Parameter Tab
Fig 13 General Tab

14 Valve Control Module User’s Manual
Fault and Idle Actions
The VCM can be congured to go into a known state, or maintain its last commanded state, in the event of a
Fault or Idle state. The dropdown options are:
■Fault Value—The Fault Value parameter will determine whether the valve is turned on or off during a fault with
a 1 indicating the valve will be on and a 0 indicating the valve is off.
■Hold Last State—The valve will remain in the last commanded state in the event of a fault.
The Idle Action dropdown options are the same as the Fault Action dropdown options.
Cycle Count and Limit
The VCM will track how many cycles each valve has had since manufacture. In addition, the user can set the
Cycle Limit eld to send an alarm at a desired cycle count to plan for maintenance. Setting the Cycle Limit to 0
will make that function inoperative.
NOTE: The cycle count is stored to non-volatile memory each time the cycle count grows by more than 10%.
It is not stored each and every time a valve is actuated.
Fig 15 Setting Fault Action
Fig 16 Cycle Count and Limit

Valve Control Module User’s Manual 15
Sensor Configuration
The Sensor Available eld should be set to True when the valve has a proximity sensor attached. Valves
without sensors set to False will provide feedback on the last commanded state. This eld cannot be set for the
SS-VCM-D-6-0 model but will still display on the screen.
Operation
1. Connect the VCM to the system.
2. Verify the system air is on.
Fig 17 Sensor Available
Fig 18 SS-VCM-D-6-2 connected to a SSV series

16 Valve Control Module User’s Manual
Commanding the VCM
The VCM command is a one byte poll request with the valve commands encoded as shown in the table below.
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 Valve 6
Command
Valve 5
Command
Valve 4
Command
Valve 3
Command
Valve 2
Command
Valve 1
Command
A valve command of 1 represents an open pilot valve, meaning that pressurized air from the inlet will pass to the
system valve attached to the outlet. A command of 0 closes that pilot valve. For example, a poll request of 0x01
will turn on valve 1.
Multiple valves can be turned on simultaneously. A poll message of 0x03 would turn on valves 1 and 2.
Response from the VCM
The VCM will send a two byte response to all poll requests. The rst byte is the Status Byte, the second the
State Byte. They are described in the tables below.
Status Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0
Valve 6
Cycle
Status
Valve 5
Cycle
Status
Valve 4
Cycle
Status
Valve 3
Cycle
Status
Valve 2
Cycle
Status
Valve 1
Cycle
Status
The Valve # Cycle Status will return a 0 when the valve’s cycle count is less than or equal to the cycle limit and
a 1 if the cycle limit has been exceeded. If the Cycle Limit has been set to 0, the Valve # Cycle Status should
always be 0.
State Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 0 Valve 6
State
Valve 5
State
Valve 4
State
Valve 3
State
Valve 2
State
Valve 1
State
The State Byte will return the value of the valve states as they were before the poll request requesting the
response.
Note: Due to timing restrictions of the DeviceNet protocol, the State Byte response will not reect the command
that was just sent. In order to monitor VCM valve states without changing which valves are on, send an
identical poll request.
For example:
Valve 1 is currently open, the user would like to open Valve 4, and verify both valves are actuated.
Poll request: 0x09 (keeps Valve 1 open and opens Valve 4)
Poll response: 0x01 (previous state, Valve 1 open)
Poll request: 0x09 (repeat previous message)
Poll response: 0x09 (VCM state, reecting last command)

Valve Control Module User’s Manual 17
Note: The State Byte will return the value of the sensor if a valve is congured to use a proximity sensor. This
means that the poll response may not be the same value as the command sent.
For example, when valve 1 is connected to a normally closed valve with a BI 1-EG05-AP6X sensor and is
congured to accept sensor input, the response will look like:
Valve
State
Valve
Position
Sensor
State
Valve Indicator
Light Poll Response
Off Closed On On 1
On Open Off Off 0
Maintenance
There are no eld-maintainable parts within the VCM. Contact your authorized Swagelok representative for
assistance.
The following hardware kit is available:
Enclosure Hardware Kit (MS-VCM-KIT1)
This kit contains the components used to attach and seal the interface cover included with the valve control
module, SS-VCM-D-6-2. The contents of this kit are included with that model when shipped from the factory.
■6 screws
■6 washers
■1 interface cover gasket
■6 acorn nuts
■6 cable gland O-rings
■6 cable glands and nuts
Connector Kit (MS-VCM-KIT2)
This kit contains eight #10-32 face seal push-to-connect ttings for use when connecting 1/8 in. plastic tubing
to the valve control module (VCM).
Fig 19 Valve Indicator Light

18 Valve Control Module User’s Manual
Troubleshooting
Problem Cause Remedy
Module (MOD) LED
Off No power applied to the device. Connect power.
Green Normal operation. No action needed.
Flashing Green Device needs to be configured Configure device.
Red Device has an unrecoverable fault. Cycle power to device. If device fails to recover,
contact your authorized Swagelok representative.
Flashing Red Device has invalid configuration. Check configuration setup.
Network (NET) LED
Off
The device has no power or the channel
is disabled for communication due to
bus off condition, loss of network power,
or has been intentionally disabled.
Power-up the scanner, provide network power
to channel, and make sure channel is enabled in
both the scanner configuration table and module
command word.
Green Normal operation. No action needed.
Flashing Green
The channel is enabled but no
communication is occurring.
The two-digit numeric display for the
channel indicates an error code that
provides more information about the
condition of the channel.
Configure scan list table for channel to add
device.
Red
The communication channel has failed.
The two-digit numeric display for the
channel indicates an error code that
provides more information about the
condition of the channel.
This may indicate a defective scanner.
Reset scanner. If failures continue,
replace scanner.
Flashing Red
At least one of the devices in the
scanner’s scan list table has failed to
communicate with the scanner. The
network has faulted.
The two-digit numeric display for the
channel indicates an error code that
provides more information about the
condition of the channel.
Examine the failed device and examine the
scan list table for accuracy.
General
System valves do
not actuate. VCM inlet pressure is too low.
The system valve actuation pressure may be
different from the VCM operating pressure.
Ensure the inlet pressure is suitable for the
system valve.
System valves
do not return to
normal state
VCM exhaust may be blocked. Ensure that the VCM exhaust is able to properly
vent.
Valve indicator
LED is on when
valve is closed
The valve has been configured to read
the feedback from the proximity sensor.
The valve indicator LED will reflect the value of
the sensor not the position of the valve.
System valve
is on when the
proximity sensor
is off.
The valve and sensor have different
“polarities.” This is normal system operation.
System valves
actuate when the
pilot valve is off.
The inlet pressure is too high.
Lower the inlet pressure going to the VCM.
Notice: Applying inlet pressure above the VCM
product rating can permanently damage the pilot
valves.

Valve Control Module User’s Manual 19
Glossary
Term Definition
VCM DeviceNet Valve Control Module
Supply Inlet VCM port to which compressed air supply is connected.
Exhaust VCM port to which exhaust air is vented.
Outlet VCM port to which compressed air is passed through when the associated pilot valve is
actuated. These are the ports which will be connected to the system valves.
System Valve A pneumatically actuated valve which directly controls flow of media.
Pilot Valve
A small valve that controls actuation air to a system valve. Pilot valves are useful because
they allow a small and easily operated feed to control a much higher pressure or higher flow
feed, which would otherwise require a much larger force to operate.
PLC Programmable Logic Controller
Proximity Sensor A proximity sensor allows the VCM to monitor the system valve state.
DeviceNet A CAN based, multi-drop network that connects and serves as a communication network
between industrial controllers and I/O devices.
Ingress Protection (IP) A measurement of the device’s ability to keep water and dust out of the enclosure.
LED Light Emitting Diodes
MOD LED The Module LED (MOD LED) provides feedback on the status of the module.
NET LED The Network LED (NET LED) provides feedback on the status of the VCM network
connection.
Electronic Data Sheet
(EDS) A data file used by node commissioning tools to interpret parameters on the device.
Controller Area Network
(CAN) A message based communication protocol originally designed for automotive application.
Entity Parameters Values used to determine the suitability of the device for use in hazardous environments.
MAC ID Media access controller identifier.

Swagelok—TM Swagelok Company
DeviceNet—TM ODVA
RSNetWorx—TM Rockwell Automation, Inc.
© 2012 Swagelok Company
Printed in U.S.A.
October 2012, R0
MS-13 -221