Configuration Options

gpca/gpcma pressure controller GPCA Absolute Pressure Controller, General Purpose, Metal-sealed


  • Type
    GPCA Absolute Pressure Controller
  • Pressure Range
    500 Torr, 1000 Torr, 2000 Torr, 100 psia Full Scale
  • Fitting Type
    Swagelok® 4 VCR Male
    1-1/8 inch surface mount (C-seal, W-seal)
    1/4 inch Swagelok compression seal
  • Valve Position
    Normally Closed
  • Valve Seat
    PTFE (Teflon®)
  • Flow Rate
    50, 200, 1000, 5000, 10000, 20000, 30000, 50000 (sccm)
  • Pressure Readout Units
    Torr, kPa, psi, mbar
  • Pressure Resolution
    0.1 Torr
  • Pressure Control Accuracy
    ±1.0% of Reading (≥10% Full Scale)
    ±0.2% of Full Scale (<10% Full Scale)
  • Transducer Over Pressure Limit
    2x Full Scale for all ranges
  • Maximum Differential Pressure
    45 psid
  • Burst Pressure
    1500 psig
  • Control Mode
    Upstream or Downstream
  • Pressure Measurement Accuracy
    ±0.5% of Reading
  • Zero Temperature Coefficient
    ±0.02% of Full Scale/°C
  • Span Temperature Coefficient
    ±0.04% of Reading/°C
  • Control Range
    >2 to 100% of Full Scale
  • Typical Response Time
    <1.0 second
  • Operating Temperature
    10-50°C (50-to 122°F)
  • Storage Temperature
    -20-80°C (-4-176°F)
  • Storage Humidity
    0 to 95% Relative Humidity, non-condensing
  • External Leak Integrity
    <1 x 10-10 (scc/sec He)
  • Leak Integrity Through Closed Valve
    <1.0% of orifice Full Scale (Nitrogen at 25 psig on inlet to atmosphere)
  • Wetted Materials
    Standard: 316L S.S. VAR (equivalent to 316 S.S. SCQ for semiconductor quality), 316 S.S., Elgiloy®, KM-45
    Optional: PTFE (Teflon) Valve Seat
  • Surface Finish
    <10 µinches, average Ra electropolished
  • Power Required
    DeviceNet™: +11 to +25 VDC per (<4 watts)
    EtherCAT®: +24 VDC (<5 watts)
    RS485: +15 to +24 VDC(<4 watts)
  • Connector-Interface
    DeviceNet™: 5 pin micro connector (power and comm.)
    EtherCAT®: 2 x RJ-45 (comm.) male, M8 male, 5 pin (power)
    RS485: 9 pin Type D male (power and comm.)
  • Data Rate Switch
    DeviceNet™: 4 positions: 125, 250, 500K (Default), (programmable over network)
    EtherCAT®: No switch
    RS485 No switch (set data rate via RS485)
  • EtherCAT Communication Rate
    100 Mbps
  • DeviceNet Communication Rate
    125 Kbps, 250 Kbps, 500 Kbps
  • RS485CommunicationRate
    9.6 Kbps,19.2 Kbps,38.4 Kbps
  • MAC ID Switches
    DeviceNet™: 2 switches, 10 positions: 0,0 to 6,3, 1 to 254
    EtherCAT®: 3 switches, 16 positions
    RS485: Set address over RS485 - Station Addresses 0,0 to 9,9
  • Network Size
    DeviceNet™: Up to 64 nodes
    EtherCAT®: Up to 4095 nodes
    RS485: Up to 32 nodes
  • Indicators
    DeviceNet™: LED Network (green/red), LED Module (green/red)
    EtherCAT®: LED Power (green), LED Run (green), LED Error (red), LED Comm (green)
    RS485: LED Comm (yellow), LED Error (red)
  • Weight
    <3 lbs (1.36 kg)
  • Compliance


Digital IO Options

The GPCA digitally controlled pressure controller is available with EtherCAT®, DeviceNet™ or RS485 digital I/O. The digital control electronics utilize the latest in MKS control algorithms providing fast and repeatable response to set point throughout the device control range. Typical response times are less than 1 second dependent on installation conditions. Included is a digital calibration that yields 1% of set point accuracy.

High Purity Applications

The GPCA metal-sealed pressure controller with its 10 microinch, electropolished surface finish is well suited for use in high purity process applications. The GPCA is available with a normally closed valve and may be configured for controlling either inlet pressure to the device or the outlet pressure of the device.

GPCA Pressure Controller Upstream Application Diagram
GPCA Pressure Controller Downstream Application Diagram

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