Emerson FB2100 - Pulse Inputs; PI Wiring; 3-5. Pulse Input Characteristics

FB2100 Flow Computer Instruction Manual
D301783X012
November 2023
I/O Configuration and Wiring 73
3.5 Pulse Inputs
The FB2100 flow computer with I/O option 2 includes two channels that can be
individually configured as either pulse inputs (PI), digital inputs (DI), or digital outputs
(DO).
When configured as pulse inputs, the PI channels have the following characteristics:
Table 3-5. Pulse Input Characteristics
Type
Number Supported
Characteristics
Pulse Input (PI)
0 to 2 as follows (I/O option 2
only):
 1 or 2 non-isolated channels
on CPU board (PI/DI/DO1 and
PI/DI/DO2). Two always
present; you can configure
one, both, or neither as PIs.

Supports dry contacts and
open collector outputs
connected to ground and
voltage inputs

Supports single pulse for
volume or mass

Input filtering selectable at 30
µs or 1 ms

Frequency range from 0 to10.5
KHz

Maximum input frequency for
the 1 ms filter is 300 Hz

When a channel is configured
as a PI it cannot be used as a
DI or DO channel

ON when greater than 3.0V;
OFF when less than 2.0V
3.5.1 PI Wiring
The diagram below shows how to wire the pulse inputs.