Measurement Computing USB-QUAD08 - Manual (Page 6)

6
Chapter 1
Introducing the USB-QUAD08
The USB-QUAD08 is a USB 2.0 high-speed device supported under popular Microsoft ® Windows ® operating
systems. The device is compatible with both USB 1.1 and USB 2.0 ports.
The USB-QUAD08 provides the following features:
 Eight counter inputs (quadrature/non-quadrature mode)
o Simultaneous input and decoding of up to eight incremental quadrature encoders.
o High-speed pulse counter for general counting applications; multiple counting modes supported
o Configurable as single-ended or differential
o 10 MHz, 16-, 32-, 48-bit resolution, ±12 volt input range
o Indicator LEDs show the status of each counter/encoder input
o 16 debounce settings
 Eight digital I/O bits
o Configurable as input or output
o Digital input bits accept voltage inputs up to 50VDC (42.4Vpk)
o Digital output bits are open collector, with clamping diodes for CEMF (counter-electromotive force)
suppression
 Internal/external pacing
 Internal software trigger and external digital trigger
I/O connections are made to ten banks of detachable screw terminals or 37-pin D-type connectors. The 37-pin
connectors are pin-compatible with the PCI-QUAD04 for upgrade/migration from a PCI bus, although software
migration is required.
The USB-QUAD08 is powered by the +5 volt USB supply from your computer. When operating in encoder
mode, the USB-QUAD08 passes an external supply of up to 50 VDC (current rated at 1.5 A @ 5 VDC) through
the ENC+ IN screw terminal to all connected ENC+ terminals.