Measurement Computing PointScan 300 Series rev.1.0 - Manual (Page 21)

PointScan/300 User’s Manual 8-23-01 Discrete Input Modules 4-5
PointScan/327
High-Speed Counter Module
This high-speed counter module has eight isolated circuits that accept pulse inputs from a variety of
sources, including quadrature and incremental encoders. Count values are reported in 16 bit analog input
registers, with 32 bit results available by cascading two adjacent I/O channels to report total counts. The
states of the counter inputs are also reported as discrete inputs. Pulse rates up to 50 kHz are supported. The
counters may be reset by toggling discrete output bits. Counter modes are selected using the Remote IO
Toolkit program. Refer to the Remote IO Toolkit online help system for more information.
Input Wiring
Screw terminal assignments, compatible only with the universal wiring base, are shown below. For best
noise immunity, connect input signals using twisted wire pairs. To maintain the best differential noise
rejection, do not connect (-) screw terminals together at the I/O base.
* Populate the appropriate load resistor, unless your sensor
does not require one.
Typical Wiring Models