se Remote Set-Point Control Security System - Prevents
Unauthorized Changes Control Backup Systems in the
Event of an Emergency
The Cla-Val 131VC-1 Electronic Control System is
designed to achieve unprecedented valve control
accuracy and stability. Ideal for remote valve control,
the 131VC-1 Electronic Control System provides the
interface between SCADA system computers and
hydraulic control valves sites.
Electronic Control of Hydraulic Valves
The 131VC-1 Electronic Control System is designed to work in
conjunction with Cla-Val 131 Series hydraulic control valves
a combination that takes advantage of the simplicity of
hydraulic valve operation and the control possibilities available
with electronics.
The 131VC-1 Electronic Control System receives transmitted
signals and activates dual solenoid pilots on the hydraulic con-
trol valve. These pilots direct hydraulic pressure within the sys-
tem to position and regulate the valve. By continuously com-
paring system conditions to the programmed set-point, the sys-
tem is automatically maintained at the desired value.
Additional important control features, unique to this type of
valve control, are offered as standard. They are designed for
user friendly operation and system safety and are addressed in
this brochure.
Key Advantages
Proven reliable hydraulic control valve
Low electric power requirement
Solid state electronic components
No motors, bearings, bushings or packings to
wear out or leak
We Not Only Sell Valves
We Provide Solutions
SERIES How it Works
131-01 Valve
Transmitter
Dead
Band
Set-Point Command
131-01 Valve
Transmitter
Transmitter
Feedback
Signal
Deviation
Transmitter
131-01 Valve
Devitation
Transmitte
Feedback
Signal
1. Set-Point Command
Set-point command is received from a
remote location or entered via the key
pad into the Electronic Valve Controller.
2. Feedback and Comparison
The Electronic Valve Controller compares
the feedback signal from the transmitter
to the set-point. If the deviation exceeds
the deadband, the valve control system is
activated.
Display
The 131VC-1 has been engineered to be the industrys most
user friendly controller. With three digital displays areas (two
offering up to 9 characters of true alphanumeric), the 131VC-1
effectively eliminates cryptic messages, sub-routines and loops
that could confuse even the most experienced operator. The
bright, crisp display is vacuum fluorescent, and offers much
better readability than any other display technology. Additional
operator-friendly features include: custom programmable
alarm messages, illuminated keys, and an easy-to-use menu
system.
Status Indicators - Four status indicators show the controllers
operating status at all times:
Manual Key Light: For manual control.
Set-point Key Light: For indication of remote control.
Output Indicator: OUT and indicator lights illuminate
when either output 1 or 2 are on.
Alarm Indicator: ALM and indicator lights illuminate
when either output 1 or 2 are on.
Keys Pads: All menu entry, configuration, tuning and set-point
controls is entered through rugged backlit rubber keys. A simple
menu system prompts the operator, step by step, through all
procedures. Security system prevents unauthorized changes to
all values.
3. Valve Actuation
The Electronic Valve Controller actu-
ates the solenoid controls, causing the
valve to modulate as needed to regain
the set-point condition.
Keypad & Display
131VC-1 (R-5/00) How To Order


Order
Output 1: Control
Code
Mechanical Relay (5 amp)
1
Analog (milliamp)
2
Solid State Relay (triac) (1 amp)
3
Output 2: Control, Alarm, or Retransmission
Mechanical Relay (5 amp)
1
Analog (milliamp)
2
Solid State Relay (triac) (1 amp)
3
Output 3: Control, Alarm, Retransmission, or Loop Power
Mechanical Relay (5 amp)
1
Analog (milliamp)
2
Solid State Relay (triac) (1 amp)
3
Loop Power
5
Output 4: Alarm, Retransmission, or Loop Power
Mechanical Relay (0.5 amp, 24 V)
1
Analog (milliamp)
2
Solid State Relay (triac) (0.5 amp, 24 V)
3
Loop Power
5
Options
Enter Ò0Ó if not desired
24 VAC/24 VDC Operation
F
Remote Setpoint
B
Set of Five Digital Inputs
D
Certification
H
Five Digital Inputs and Certification
J
131VC -1
V
C
0
3
3 Features
Alarm - Programmed to signal when system conditions exceed a desired
value or in the event of a system component failure. It can be configured
to be latching or non-latching, normally open or normally closed contact
with deadbands.
Absolute Alarm - Activates when the process variable exceeds
alarm set-point. It can be either high and/or low acting.
Deviation Alarm - Shifts as the set-point is changed. It can be
symmetrical or asymmetrical.
Fault Alarm - Activates when the process variable is lost.
Set-Point Rate of Change - Prevents accidental or sudden changes in
the programmed set-point. It is also invaluable when used on high differential
or surge sensitive applications where valve speed of operation must be
tightly controlled.
Process Variable Backup - Can automatically recognize secondary
process variable or can be programmed to open or close valve or can
default to backup pilot system using alarm function.
DC Power Supply - Provides source of power for signal transmitter.
Retransmission - Transmit process variable or set-point values.
Offsets - Adjusts the process variable and remote set point settings if
respective signals do not match.
Filter - Stabilizes process variable signal when required.
Security System - Prevents unauthorized changes.
Input Linearization - For flow measurement across orifices, venturies, etc.
Serial Communications - RS485 or RS232. (optional)
Digital Inputs - Selects specific set-points. (optional)
NEMA 4X Enclosure (optional)
Input Signals
The 131VC-1 Electronic Control System is designed to accept
industry standard 4-20 mA full scale signals for pressure, flow or
level control from customer supplied transmitter(s).
Flow Measurement using a differential signal requires activating
the square root extractor to obtain direct flow readout.
Modulating Level Control requires the use of an optional X117
Valve Position Transmitter in addition to a level transmitter.
Valve Position Control requires an optional X117 Valve Position
Transmitter installed on the valve.
Other configurations are available on a special order basis, consult
the factory for details.
Specifications
Control Input:
4-20 mA full scale (others optional)
Control Parameters
Proportional Bands: 1 to 999%, settable in 0.1%
increments independently for opening and closing
Deadbands: achievable up to 15% of input range
Cycle Time: 1 to 120 seconds in 1 sec. increments.
Environmental Parameters
Temperature: 0°C to 50°C (32°F to 1 22°F)
Humidity: 10 to 90%, non-condensing
Power Consumption
15 watts Max. at 120 VA, 50160 Hz
Voltage and Frequency
Universal power supply: 90 to 250 VAC, 48 to 62 Hz.
24 to 30 volts AC or DC, +/- 5%.
Noise Immunity
Common mode rejection (process input): >120 db.
Normal mode rejection (process input): >80 db.
AC line is double filtered and transient protected.
Snubbers are provided for each relay output.
Construction
Case: extruded, non-perforated black anodized
aluminum with ABS plastic sleeve.
Bezel: Black plastic ABS.
Chassis assembly: plug-in type.
Keys: Silicone rubber with diffusion printed graphics.
NEMA rating: front panel conforms to NEMA 4X when
instrument is properly installed.
Agency Approvals
Memory Retention
Lithium battery maintains all programming for approximately
ten years.
Security
There are two levels of access: restricted and full. A
configurable code is used to enter the full access level.
Functions not available in the restricted level are configurable.
LISTED
Process Control Equipment
4N66
LR 84603 VALVE RESPONSE TIME
DEVIATION BAND
DEVIATION BAND
Faster
Slower
Higher
Lower
Dead
Band
VALVE SENSITIVITY
SET-POINT
SOLENOID
CYCLE TIME
Feature in blue
are user programmable
PROPORTIONAL
OUTPUT CIRCUIT NO.2
PROPORTIONAL
OUTPUT CIRCUIT NO.1
Valve Solenoid
"On" Time
SOLENOID
CYCLE TIME
100%
75%
50%
25%
0%
Full Programmable Control of Valve Sensitivity and Valve
Response
Designed with duplex output circuits (one to control the valve
opening solenoid and one to control the valve closing solenoid ).
The 131VC-1 Electronic Control System can be programmed to
maintain precise control of any process. Each output circuit has
an independently programmable proportional band and solenoid
cycle time. By adjusting these control algorithms in combina-
tion, the response time can be varied over a wide range.
Proportional Band
The proportional band can be programmed from 1 to 999 per-
cent of transmitter scale. Programming a narrow deviation band
will result in faster valve response, whereas a wider band will
result in slower response.
Proportional Response Time
The response time of the valve is proportional to how far the
process variable is from the set-point. If there is only a small
deviation, the solenoid on-time will be short and the valve will
move slowly. For large deviations, the on-time will be longer
and the valve speed will be faster.
Solenoid Cycle Time
The opening and closing solenoid pilots operate in on-off
cycles. The cycle time is programmable to allow the valve to
make a smooth transition to the set-point and avoid overshoot-
ing.
Dual Output Circuits
The two output circuits can be programmed independently to
respond at different rates. For example: fast response above
the set-point; slow response below the set-point.
Set-Poin