Emerson FB3000, Инструкция по эксплуатации

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Emerson FB3000 RTU Instruction Manual
D301851X012
May 2022
40 I/O Configuration and Wiring

The actual values read back are unavailable to the user and these checks are made
internal to the firmware.
3.3 Digital Inputs
The FB3000 RTU supports a mixed I/O module which includes eight channels you can
individually configure as either analog inputs (AI), digital inputs (DI) or pulse inputs (PI).
The number of mixed I/O modules supported depends on the number of I/O slots in the
RTU.
When configured as digital inputs, the channels have the following characteristics:
Table 3-4: Digital input Characteristics
Type Number Supported Characteristics
Digital Input
(DI) Any of AIDIPI_01
through AIDIPI_08
can be individually
configured as digital
inputs.

When a channel is configured as a DI it cannot be
used as an AI or PI channel

The range of digital inputs must remain within the
span of 0VDC to 30VDC.
 All digital inputs have 1V hysteresis applied to
them; switching levels are 2VDC for rising signals
and 1VDC for falling signals.

Dry Contact
 Digital inputs require an internal or external pull-up
to 30VDC and pull-downs must be to ISO_GND.
When using internal pull-ups or pull-downs, you
have a choice of 2mA or 66µA (selectable in
FBxConnect) or a 66µA or 2mA pull-down to
ISO_GND. Choice of higher current (2mA) results in
faster input; choice of lower current (66µA) results
in slower input.
 10 Hz filter (low speed)