Measurement-computing USB-QUAD08 User Manual Page 15
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USB-QUAD08 User's Guide Installing the USB-QUAD08
15
Connecting the USB-QUAD08 to an encoder
Up to eight encoders can be connected to the screw terminals (nPHA, nPHB, and nINDX, where n is the
number of the encoder (0 to 7) on the screw terminal). Up to four encoders can be connected to each 37-pin
connector (external J12 and internal J50).
Encoder inputs are configurable in differential or single-ended mode. Each A and B signal can be made as a
single-ended connection with respect to the ±12V to common ground (GND).
To connect the USB-QUAD08 to an encoder, make the following connections:
Connect encoder signals A, B, and Z to the A, B, and Index pins on the screw terminal or 37-pin connector.
Connect the encoder ground to a ground (GND) terminal.
Connect the encoder power supply input to an ENC+ screw terminal.
To power the encoders, the USB-QUAD08 passes an external supply of up to 50 VDC (current rated 1.5 A
@ 5 VDC) through the ENC+ IN encoder power input terminal to the ENC+ encoder power output
terminals. Diodes protect against reverse polarity.
Connect the supply return to a ground (GND) terminal.
Caution! Ensure that the signals are connected such that there is no potential between PC ground and signal
ground. Make sure that the current output specification is not exceeded.
Figure 12 shows the differential input connections to one encoder.
Figure 12. Differential encoder connections to the screw terminal or 37-pin connector
- User's Guide 1
- HM USB-QUAD08.docx 2
- Table of Contents 3
- Chapter 4 4
- About this User's Guide 5
- Introducing the USB-QUAD08 6
- Installing the USB-QUAD08 7
- Installing the hardware 8
- Signal connections 9
- Screw terminal pinout 10
- Signal termination 14
- DIN-rail mounting 14
- ENC+ screw terminal 15
- Functional Details 17
- External components 18
- Counter input modes 19
- Totalize counter mode 20
- Period measurement mode 21
- Pulse width measurement mode 21
- Synchronous scanning 21
- Debounce mode 22
- Trigger before stable mode 23
- Debounce mode comparisons 24
- Digital I/O 25
- Triggering 26
- Encoder power 27
- Mechanical Drawings 28
- Specifications 29
- Trigger and pacer 30
- Indicator LEDs 30
- Environmental 31
- Mechanical 31
- USB specifications 31
- I/O connectors 32
- Screw terminal connectors 33
- 37-pin connectors 35
- Declaration of Conformity 37
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