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Diamond-MM-48-AT User Manual V1.01 Page 8
board should have the pull-down resistor enabled with a jumper in the R location. The other
boards should have the R jumper removed to disable their pull-down resistors.
4.3 Optocoupler Polarity
The 4 optocouplers may be configured for either direct or inverted polarity with the POL
position on J6. For direct polarity, an open circuit / low voltage input reads back as a 0, and a
high voltage reads back as a 1. For inverted polarity, an open circuit / low voltage reads as 1,
and a high voltage reads as 0. For direct polarity, the POL jumper should be absent. For
inverted polarity, install a jumper in the POL location.
4.4 Reserved
The EWP position on J6 is reserved for a future option and currently has no function.
4.5 Analog Input Range
On the standard bipolar input range model, the input range can be selected with a jumper for
either +/-10V or +/-5V. For +/-10V operation, jumper block J10 should be open. For +/-5V
operation, install a jumper in J10.
On the unipolar input range model, the input range is fixed at 0-5V, and J10 does not serve
any purpose.