Measurement Computing PCM-QUAD02 - Manual (Page 8)

PCM-QUAD02 User's Guide Introducing the PCM-QUAD02
The incremental encoders connect to each channel through either a screw terminal board or a user-configurable,
non-terminated cable. The signals provided are (per channel):
ƒ Phase A+, A–
ƒ Phase B+, A–
ƒ Index+, Index–
ƒ +5V and GND (optional power for 5V encoders; not to exceed 400 mA peak)
PCM-QUAD02 block diagram
PCM-QUAD02 functions are illustrated in the block diagram shown here.
FPGA
Control
Decode
Signal Routing
CIS
Memory
Channels 1 and 2
PCMCIA bus
Address
Data
Data Control
Signalling
LS7266: 24 bit dual-axis
quadrature counter
IRQ
Control
75ALS175
75ALS175
Input
Configuration
Quadature
Encoder
Input
Channel
1
Channel
2
S.E./DIFF
Setting
Termination
S.E./DIFF
Setting
Termination
Figure 1. PCM-QUAD02 functional block diagram
Software features
For information on the features of InstaCal and the other software included with your PCM-QUAD02, refer to
the Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf .
Check www.mccdaq.com/download.htm for the latest software version.
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