Figure 39: Foundation Fieldbus Connection
6.2.5.3 Service Port
The wiring of the service port is similar to the DCS port wiring.
For more detailed information, please refer to: FGM 160 – Operator Console Description [5].
6.2.5.4 Current Loop Outputs (4-20mA)
The FGM 160 has three operational 4-20mA current loop outputs as default, with additional
three as an option.
Each of the current loop outputs can be configured either as active or passive output.
In active output configuration, the current loop is powered from the FGM 160 field computer.
In passive output configuration, an external power source is required.
In default configuration, all current loop outputs are configured as active outputs.
The current loop outputs can be configured as follows:
Analog output.
o The output is assigned to a specific parameter/process variable and
configured with a desired range.
Alarm status output.
o The output can be configured as a specific alarm output (e.g. temperature
alarm) or as a general global alarm output.
o Alarm level can be set to 4mA or 20mA.
Level indicator output.
o The output can be configured to shift from 4mA to 20mA (or opposite) at a
certain level of the assigned variable.
Current Loop Outputs are replaced by Foundation Fieldbus Outputs in FGM 160 Foundation
Fieldbus configuration.
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