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Datasheet P-712CV

EL-PRESS P-712CV (P1-control)

Digital Electronic Back Pressure Controller

  • Back pressure control (controls upstream pressure "P1")
  • For absolute or gauge pressure
  • High accuracy and repeatability
  • Well proven, compact thru-flow design
  • Compact design with on-board PID controller and direct acting control valve
  • Analog, RS232 and fieldbus communication
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EL-PRESSP-712CV (P1-control)

Digital Electronic Back Pressure Controllers

Bronkhorst® model P-712C Back Pressure Controllers (EPCs) are suited for precise measurement and control of upstream pressure ranges between 1,28…64 bar and 2…100 bar absolute or gauge. The EPC has a well-proven compact thru-flow design and includes a diaphragm type piezo-resistive pressure sensor, a microprocessor based pc-board with signal and fieldbus conversion and a compact, fast acting control valve.

EL-PRESS series are equipped with a digital pc-board, offering high accuracy, excellent temperature stability and fast response. The main digital pc-board contains all of the general functions needed for measurement and control. In addition to the standard RS232 output the instruments also offer analog I/O. As an option, an on-board interface can be mounted to provide CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK or FLOW-BUS protocols.

Technical specifications

Measurement / control system
Absolute pressure sensorsCode: M10A - Ranges (FS): 20 ... 100 bara - P-max: 200 bara
Code: M40A - Ranges (FS): 100 ... 400 bara - P-max: 500 bara
Accuracy (incl. linearity and hysteresis)standard: ± 0,5 % FS
Repeatability< 0,1 % RD
Pressure rangeabilitymeasurement: 1 : 50 (2…100%)
control: 1 : 5 (with flow range 1 : 50)
Control stability≤ ± 0,05 % FS (typical for 1 ln/min N2 at specified process volume)
Operating temperature-10 … +70 °C
Temperature sensitivity0,1% FS/°C
Max. Kv-value6,6 x 10-2
Leak integrity, outboardtested < 2 x 10-9 mbar l/s He
Attitude sensitivitymax. error at 90° off horizontal < 0,3 mbar
Warm-up timenegligible
Mechanical parts
Material (wetted parts)stainless steel 316L or comparable
Process connectionscompression type or face seal (VCR/VCO) couplings
Sealsstandard: FKM/Viton®;
options: EPDM, FFKM/Kalrez®, FDA and USP Class VI approved compounds
Weight0,7 kg
Ingress protectionIP40
Electrical properties
Power supply+15 … 24 Vdc
Max. power consumption
Supply
15 V
24 V		 at voltage I/O
290 mA
200 mA		 at current I/O
320 mA
215 mA		 extra for fieldbus
<75 mA
<50 mA
Analog output0…5 (10) Vdc or 0 (4)…20 mA (sourcing output)
Digital communicationstandard: RS232;
options: CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP, POWERLINK or FLOW-BUS
Electrical connection
Analog/RS2329-pin D-connector (male);
PROFIBUS DPbus: 9-pin D-connector (female);
power: 9-pin D-connector (male);
CANopen® / DeviceNet™5-pin M12-connector (male);
FLOW-BUS/Modbus-RTU/ASCIIRJ45 modular jack
Modbus TCP / EtherNet/IP / POWERLINK2 x RJ45 modular jack (in/out);
EtherCAT®/ PROFINET2 x RJ45 modular jack (in/out);
Control valve options
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates

Technical specifications subject to change without notice.

Note: The measuring cell of the pressure sensor is separated from the external pressure by a thin, sensitive stainless steel diaphragm, and the sealed off cavity between diaphragm and cell is filled with oil. Since the standard oil filling is flammable, Bronkhorst advises to take precautions when oxygen or any other explosive fluid is used.

For dimensional drawings and hook-up diagrams please visit the product page on our website

Downloads

Brochures
EL-PRESS brochure
Manuals
Manual EL-PRESS
Quick installation guide EL-PRESS
Hook-up diagrams
Analog IO - RS232
DeviceNet
EtherCAT
FLOW-BUS
Modbus RTU/ASCII
PROFIBUS DP
PROFINET
CANopen
EtherNet/IP
Modbus-TCP
POWERLINK
Optional Bus and IO Configurations
Dimensional drawings
P-702CV_P-712CV
Dimensions Adapters
Dimensions Digital Cases
Solids 3D
P-702CV_P-712CV
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Bronkhorst High-Tech designs and manufactures innovative instruments and subsystems for low-flow measurement and control for use in laboratories, machinery and industry. Driven by a strong sense of sustainability and with many years of experience, we offer an extensive range of (mass) flow meters and controllers for gases and liquids, based on thermal, Coriolis and ultrasonic measuring principles. Our global sales and service network provides local support in more than 40 countries. Discover Bronkhorst®!