Measurement Computing PointScan 200 Series rev.1.0 - Manual (Page 19)

PointScan/200 User’s Manual 9-12-01 Discrete Output Modules 4-1
Discrete Input Modules 4
PointScan/221
8 Discrete Inputs / Counters with Direct Field Wiring Base
PointScan/221
8 Discrete Inputs / Counters with Isolated Inputs
Overview
The standard field wired base provides a pre-wired connection to DC power for each of the eight discrete
input channels. For applications which require individually isolated, ground sinking,
or AC inputs, the optional universal wiring base is recommended. An input count feature uses analog input
registers to accumulate the positive transitions of each input. More information on this and other features
can be found in the on-line help supplied with the IO Toolkit.
Number of Channels 8 discrete inputs with pulse counter feature
Input Voltage Range 10 - 30 VDC (standard), 10 - 30 VDC/VAC (optional)
Maximum Count Rate 100 Hz (6000 / minute) each input, plus selectable 2KHz (120,000 / minute)
mode for input 1 only
Standard Wiring
The even numbered terminals (2 - 16) on this field wiring ready base are pre-wired to the DC power (+)
terminal. Adjacent pairs of terminals are connected to each input (switch) device.
Optional Wiring
A pair of floating terminals is provided for each input to provide channel-to-channel isolation
(floating inputs) and a choice of sourcing (power switching), sinking (ground switching) or AC signals on
each input.
I/O Registers
Function IOtech Registers Modbus Registers
Discrete Inputs X0 - X7 10001 – 10008
Counter Inputs AX0 - AX7 30001 - 30008 Unsigned values: 0
Æ 65,535