Analog Inputs; Ai Wiring; Table 3-1. Analog Input Characteristics - Emerson FB2100 Instruction Manual

3.1

Analog Inputs

The FB2100 flow computer with CPU 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
Analog
Input (AI)
3.1.1

AI Wiring

The diagram below shows how to wire the analog input.
I/O Configuration and Wiring
Number Supported
0 to 2 as follows under CPU 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.
Emerson 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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