Analog Inputs; Ai Wiring; Analog Input Characteristics - Emerson FB2100 Instruction Manual

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.
Type
Analog Input
(AI)
3.1.1

AI Wiring

The diagram below shows how to wire the analog input.
I/O Configuration and Wiring

Analog Input Characteristics

Number Supported
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.
FB2100 Flow Computer Instruction Manual
Characteristics
 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
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