Emerson FB2100 - Analog Inputs; AI Wiring; Analog Input Characteristics

FB2100 Flow Computer Instruction Manual
D301783X012
November 2023
I/O Configuration and Wiring 67
3.1 Analog Inputs
The FB2100 flow computer with I/O option 2 includes two on-board channels that you can
individually configure as analog inputs (AI) or analog outputs (AO).
Note
No external resistor is required for a current (mA) device. You can apply a 250 ohm
resistor using analog input configuration selections in FBxConnect.
When configured as analog inputs, the channels have the following characteristics:
Table 3-1. Analog Input Characteristics
Type
Number Supported
Characteristics
Analog Input
(AI)
0 to 2 as follows under I/O
option 2 only:
 1 or 2 non-isolated channels
on CPU board (AI/AO1 and
AI/AO2) always present. You
can configure one, both, or
neither as AIs.

4 to 20 mA range (@24Vdc), or
1 to 5Vdc

Over range for calibration
purposes: 3.2 to 20.8 mA or
0.8 to 5.2 Vdc

Externally powered (current
mode only)

Factory calibrated (re-
calibration is unnecessary for
at least 3 years)

Signal conditioning

When you configure a channel
as an AI it cannot be used as
an AO
3.1.1 AI Wiring
The diagram below shows how to wire the analog input.