Measurement-computing PointScan 100 Series rev.1.0 Bedienungsanleitung PDF herunterladen (Seite 21)

PointScan/100 User’s Manual

9-12-01

Discrete I/O Modules 4-3

PointScan/127

High Speed Counter Module

Overview

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 or 32 bit long registers. The states of the counter inputs are also reported as discrete inputs. Pulse

rates up to 50 kHz are supported. The counters can be reset by toggling discrete output bits. Counter modes

are selected using the IO Toolkit program. More information on this and other features can be found in the

on-line help supplied with the IO Toolkit program.

Number of Channels 8 discrete inputs, isolated

Input Voltage Range 12/24 VDC/VAC

Input Current @ 24 VDC 6.7 mA

Input Wiring

Screw terminal assignments 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. Positive DC voltage must be applied to an input to indicate an

ON condition. Refer to the wiring diagram below.

Any odd-numbered input can be gated by connecting a gating signal to the next highest even-numbered

input. For example, Input 2 can gate the counter for Input 1.

I/O Registers

Function IOtech Registers Modbus Registers

Discrete Inputs X0 – X7 10001 – 10008

Counter Inputs AX0 – AX7 or LI0 – LI7 30001 – 30008

35001 – 35008

Resets Y0 – Y7 00001 – 00008

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

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Measurement-computing PointScan 100 Series rev.1.0 Bedienungsanleitung Seite 21