Nematron Pointe Controller - Manual (Page 281)

Pointe Controller User Guide Appendix A: OptiLogic Technical Specifications
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A.13 OL2418 Analog Current Input
The OL2418 Analog Current Input Module
provides eight (8) amperage sensors. Each
sensor reads the current input amperage,
scales it, and writes the scaled value to a Logic
Memory tag. The value has 14-bit resolution
and is scaled from 0 to 16383 (0x0 to 0x3FFF);
i.e., the minimum amperage is equal to 0, the
maximum amperage is equal to 16383, and all
other amperages are scaled in between.
NOTE: The OL2408 module is currently designed for an amperage range of 4 to 20
mA. This range cannot be changed.
To convert the scaled value back to an actual amperage input, you must
configure a Flow Chart block or Ladder Logic rung to perform the following
calculation:
Amperage Input = [ 16 x ( Scaled Value / 16383 ) ] + 4
Technical Specifications
Card Cage Power Required 700 mA
Inputs 8
Input Type 4-20 mA
Input Impedence 250 Ohms +/- 0.05%
Conversion Type Successive approximation
Resolution 14 bit (1 in 16384)
Full Scale Calibration Error +/- 15 counts maximum
+/- 5 counts typical
Offset Calibration Error +/- 2 counts maximum
Power Isolation Transformer
Signal Isolation Optical
Terminal Strip Plug In (removable)
Terminal Screws Slotted (0.1” blade max.)
Max. terminal wire gauge 18 AWG (use copper conductors)
Terminal block torque 2.2 lb-in
Required Temp. rating of
field installed conductors 60°C / 75°C
Type 18