Emerson FB3000, Instruction Manual

Page: 59 / 96

Emerson FB3000 RTU Instruction Manual
D301851X012
May 2022
I/O Configuration and Wiring 47
3.5 Pulse 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 pulse inputs, the PI channels have the following characteristics:
Table 3-6: Pulse Input Characteristics
Type Number Supported Characteristics
Pulse Input (PI) Any of AIDIPI_01 through
AIDIPI_08 can be individually
configured as pulse inputs.

When a channel is configured as a PI it
cannot be used as a DI or AI channel.
 The range of pulse inputs must remain
within the span of 0VDC to 30VDC.

All pulse inputs have 1V hysteresis applied
to them; switching levels are 2VDC for
rising signals and 1VDC for falling signals.

You can configure pulse inputs for either
a 2MA pull-up to 24VDC or a 2mA pull-
down to ISO_GND.
 Configurable as either medium speed 1
ms filter (0 – 300Hz) or a high speed 30µs
input filter (0-10.5kHz). Only use low
speed for a digital input (DI).