Digital Inputs - Emerson FB2200 Instruction Manual

Emerson FB2200 Flow Computer Instruction Manual
D301784X012
March 2019
Figure 3-6. AO 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/AO7 & AI/AO8)
1
3.3

Digital Inputs

Depending upon how you ordered it, the FB2200 flow computer includes two, six, or ten channels
you can individually configure as digital inputs (DI), digital outputs (DO), or pulse inputs (PI).
When configured as digital inputs, the channels have the following characteristics:
Table 3-3. Digital input Characteristics
Type
Digital
Input (AI)
70
Field Device
Number Supported
0 to 8 as follows:
▪ 1 or 2 non-isolated channels on CPU
module (DI/DO/PI1 and DI/DO/PI2).
Two are always present; you can
configure one, both, or neither as DIs.
▪ 1 to 4 additional isolated channels on
optional 8-channel expansion I/O
module (ISO DI/DO/PI3 to ISO
DI/DO/PI6). If module is present you
can configure one, two, three, four, or
none of the channels as DIs.
Characteristics
▪ Circuit protection.
▪ 30ms input filtering
Maximum input frequency of 10 Hz
▪
Selectable current source of 66  A or 2
▪
mA.
Either externally driven or internally
▪
driven and pulled to ground by dry
contact closures or open collector
devices
I/O Configuration and Wiring