Emerson FB2200 Flow Computer Instruction Manual
D301784X012
March 2019
68 I/O Configuration and Wiring
Figure 3-4. AI Wiring: Optional 8-channel Expansion I/O Module (ISO AI/AO 3,4,5,6) and Optional
6-channel Expansion I/O Module (ISO AI/AO 7,8)
3.2 Analog Outputs
The FB2200 flow computer includes two on-board channels you can individually configure as either
analog outputs (AO) or analog inputs (AI). The optional 8-channel expansion I/O module includes 4
additional channels you can individually configure as AOs or AIs. In addition, if you purchased the
optional 6-channel expansion I/O module, there are two additional channels you can individually
configure as either AOs or AIs.
When configured as analog outputs, the channels have the following characteristics:
Table 3-2. Analog Output Characteristics
0 to 8 as follows:
▪
1 or 2 non-isolated channels on CPU
module (AI/AO1 and AI/AO2) always
present. You can configure one, both,
or neither as AOs.
Note: If you configure both as AOs we
recommend you provide isolation to
avoid ground loops, which could affect
readings.
▪
1, 2, 3, or 4 additional isolated
channels on optional 8-channel
expansion I/O module (ISO AI/AO3,
ISO AI/AO4, ISO AI/AO5, or ISO
▪
4 to 20 mA range (@24Vdc)
▪
Externally powered field device
(Ai/AO1 and AI/AO2)
▪
24V loop supply powers AO (ISO
AI/AO3 through ISO AI/AO8)
▪
AO sinks current to system ground
▪
Factory calibrated (re-calibration is
unnecessary for at least 3 years)