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APCI-3702 Length Measurement Board
  • APCI-3702 Length Measurement Board

APCI-3702 Length Measurement Board

Quick Overview

The APCI-3702 is a PCI length measurement board for up to 5 simultaneous acquisition of up to 5 inductive transducers, LVDT or half-bridge sensors. The APCI-3702 includes a sinus generator supply. 64-bit drivers for Windows and Linux as well as programming samples are included, real-time drivers for Windows and Linux are available on request. Software includes 50 pre-calibrated transducer options and easy step by step instructions for calibrating transducers to individual channels.
View Options



  • PCI interface to the 32-bit data bus, 3.3 V or 5 V
  • Acquisition of 5 inductive transducers (half-bridge, LVDT)
  • 16-bit resolution
  • Sampling rate depending on the transducer: 2 to 20 kHz
  • Measuring frequency programmable through software: 2 to 20 kHz
  • Conversion triggered through software, digital input or timer
  • End of conversion through software and/or interrupt
  • PCI-DMA access
  • Onboard FIFO
  • Sequence RAM
  • 16 digital inputs and outputs, optically isolated, 24 V
  • Connection of the transducer through an external box PX 3701-8. The box type depends on the transducer, please order separately.
  • Software operation
  • Automatic setting of the input levels (gain and offset) acc. to the transducer sensitivity
  • Tool for the individual databased calibration of the transducers
  • Database for connecting/calibrating a large range of industry-standard transducers: Solartron; Tesa; Marposs; Schlumberger; Peter & Hirt; Mahr; RDP; Schaevitz; SMPR Controle. Further transducers like for example Horst Knaebel can be calibrated on request.


Safety Features

  • Input filters
  • Diagnostic function in case of short-circuits or line break



  • Gear wheel control
  • Gauge block
  • Acquisition of sensor data
  • Quality control
  • Industrial process control
  • Automatic parts control
  • R&D Instrumentation


Inputs for Inductive Transducers

Channel features

  Number: 5 (simultaneous) 
  Input Type: Single-ended
  Coupling: DC
  Resolution: 16-bit
  Accuracy: 13-bit
  Sampling Rate (on 5 channels):



Input level

  Input Impedance: 2 kΩ software-programmable 10 kΩ, 100 kΩ, 10 MΩ


Sensor supply (sinus generator)

  Type: Sinus differential (180° phase-shift)
  Number of outputs: 2
  Coupling: AC
  Programmed Signals: Output frequency fP (primary frequency): 2-20 kHz depending on the transducer (50 kHz Knaebel)
  Output Impedance: < 0.1 Ω typ., > 30 kΩ typ. in shutdown mode
  Short-circuit Current: 0.7 A typ. at 25°C with thermal protection


Digital I/O

Number of I/O Channels: 8 Digital Inputs, 8 Digital Outputs, 24V 
Optical Isolation: 1000V through opto-couplers
Input Current at 24V: 11mA typical
Max. Input Frequency: 5kHz
Max. Switching Current: 50mA typical
Input Range: 0-30V
Output Range: 5-30V

Physical and environmental conditions

Dimensions: 109 x 138 mm
System Bus: PCI 32-bit 3.3/5 V acc. to spec. 2.2 (PCISiG)
Space Required:

1 PCI slot  for analog inputs,
1 slot opening for the digital I/O with FB3702
Operating Voltage: +5 V, ±5 % from the PC; 24V external
Current Consumption
(+5V from the PC)

990mA typical, without load.

Front Connector: 50-pin SUB-D male connector
Additional Connector:
16-pin male connector for connecting the digital I/O
Operating Temperature: 0 to 60 °C (with forced cooling)

APCI-3702 Connection Details

APCI-3702 Connection Diagram

PX3701HB-8: Connection box for APCI-3702
PX3701LVDT-8: Connection box for APCI-3702

50-pin D-Sub connection cable
between APCI-3702 & PX3701-8
FB3702: Ribbon cable for digital I/O on separate bracket

Screw terminal panel for digital I/O,
DIN Rail mounting
ST010: Standard 37-pin D-Sub connection cable, 2m
ST011: Standard 37-pin D-Sub connection cable, 5m

Availability: Stock Item


Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

APCI-3702 Length Measurement Board
APCI-3702 Length Measurement PCI Board. Up to 5 Simultaneous inductive transducer inputs (16-bit resolution) via 32-pin SUB-D male connector to a PX3701-8 connection box. 8 digital inputs and 8 digital outputs, with 1000V optical isolation, via 16-pin male connector. Dimensions: 109 x 138mm, requires 1PCI slot for board, plus 1 slot opening for digital I/O via FB3702 ribbon cable. Operating Temp: 0 to 60°C (with forced cooling)

Not Available online

Connection Boxes
PX3701HB Connection Box for APCI-3701-8. 8 x Half-Bridge Sensors
or call us for a quote
PX3701LVDT Connection Box for APCI-3701-8. 8 x LVDT Sensors
or call us for a quote
Screw Terminal Panels
Screw terminal panel for DIN rails with housing for the 37-pin SUB-D female connector. The terminals allow for the connection of 32 signal lines, 4 external operating voltage feeds and 2 ground lines. Operating temperature 0-70°C.
or call us for a quote
Ribbon Cable with Bracket
Ribbon cable for connecting the Digital Input & Outputs on a separate bracket, 37-pin male connector.
or call us for a quote
Connection Cables
Standard Shielded Round Cable. 37-pin SUB-D female connector / 37-pin SUB-D male connector, twisted-pair conductors. 2m cable length.
or call us for a quote