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ML0044B December 1, 2017 Copyright 2016 Bitronics, LLC
Definitions:
Enclosure Category 2: Enclosures where no pressure difference relative to the
surrounding air is present.
Measurement/Installation Category III (Overvoltage Category III) or CAT III:
Distribution Level, fixed installation, with smaller transient overvoltages than those at
the primary supply level, overhead lines, cable systems, etc.
Pollution: Any degree of foreign matter, solid, liquid, or gaseous that can result in a
reduction of electric strength or surface resistivity of the insulation.
Pollution Degree 2: Only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation is to be expected.
1.4 Digital I/O (optional) – Extended Chassis only
1.4.1 Inputs
4 or 8 uni-directional inputs in banks of 4 inputs. These banks of four inputs are
isolated from each other on the eight input option or from the outputs on the four input
option. Input terminals have internal 510V clamp. Channels 1-4 have a common
return, and on the eight input option, 1-4 and 5-8 each have a common return per
group of four. The recommended torque ratings for the terminal block wire fasteners
are listed in the Physical Specifications table (section 1.3).
Voltage Range:
Input Range: 0 to 250Vdc
Threshold Voltage: 15V dc +/-1V or 80V dc +/-5V (at 25C)
Input Resistance: 33kohm
Input Channel-to-Channel Time Resolution: 200µs (maximum)
Input De-bounce Time: Selectable from 0ms to 2s in 1ms increments.
Input Delay Time (from terminals): <2ms
Refer to figures 1 and 2 below for simplified circuitry and terminal wiring assignments.
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