Bronkhorst

EL-PRESS P-822CV

Process Pressure Controller

  • Dual valve pressure control (inlet/relief)
  • For absolute or gauge pressure
  • High accuracy and repeatability
  • Low gas consumption (no gas bleed)
  • On-board PID controller for pressure control
  • Analog, RS232 and fieldbus communication
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EL-PRESSP-822CV

Process Pressure Controller

Bronkhorst® model P-822CV Process Pressure Controllers (PPCs) are suited for precise pressure control with closed volumes, i.e. with one fluid connection. This PPC model is suited for pressure ranges between 5…100 bar and 10…200 bar absolute. The instrument comprises a diaphragm type piezo-resistive pressure sensor, a microprocessor based pc-board with signal and fieldbus conversion and a PID controller for pressure control by means of two integrated control valves. This dual valve construction is a compact, economical alternative to configurations where forward pressure controllers are combined with separate bleed ports and relief valves. It is considered as a great advantage that the relief valve does not vent to the atmosphere. Furthermore the system can be set for either fast or smooth controlled (de)pressurization.

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
Pressure rangesmin. 5 ... 100 bar
max. 10 ... 200 bar
Accuracy (incl. linearity and hysteresis)standard: ± 0,5 % FS
Repeatability< 0,25 % RD
Pressure rangeability1:20 (with flow range 1:50)
Response time (sensor)2 msec
Operating temperature-10 … +70 °C
Temperature sensitivity0,1% FS/°C
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: Viton 514162;
Option: Kalrez 7090
Weight2,3 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
Optional Bus and IO Configurations
Dimensional drawing
P-802CV_P-812CV_P-822CV
Solids 3D
P-802CV_P-812CV_P-822CV