Measurement-computing USB-QUAD08 Manual do Utilizador descarregar pdf (Página 15)

USB-QUAD08 User's Guide Installing the USB-QUAD08

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

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