Emerson FB3000 User Manual

FB3000 RTU Instruction Manual
D301851X012
November 2023
52 I/O Configuration and Wiring
3.1.3 Digital Inputs (3MIX12/3MSG12)
The 12-channel mixed I/O module includes eight channels you can individually configure
as either analog inputs (AI), digital inputs (DI) or pulse inputs (PI).
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)

Emerson FB3000 Specifications

General

Brand	Emerson
Model	FB3000
Category	Touch terminals
Language	English