Pepperl+Fuchs / One Input Two Analog Outputs
KFD2-STC4-Ex1.2O is a Pepperl+Fuchs SMART transmitter power supply that splits one field input into two analog outputs. The .2O designation describes the output arrangement rather than two independent measurement inputs. This guide focuses on load planning and signal destinations when one process measurement must serve two receiving systems.
One measurement, two defined destinations
First, identify the transmitter and the two systems that need its signal. Record the purpose of each destination, such as control and indication. Then compare the intended arrangement with the manufacturer diagram. This makes the signal topology explicit and avoids confusing a duplicated measurement path with a two-channel transmitter supply.
KFD2-STC4-Ex1.2O input options
Official information lists support for two-wire and three-wire SMART transmitters and two-wire SMART current sources. It also specifies dual 0/4 to 20 mA outputs. Therefore, include the actual transmitter wiring type in the review. A general description such as analog barrier omits information needed to select the correct input connection.
Review both output loads together
The manufacturer notes that both output loads must be connected for complete operation within the technical specification. An open output can reduce the available transmitter supply voltage. Consequently, review the entire two-output arrangement, including any unused destination. Engineering should resolve that condition using the official documentation before the circuit reaches commissioning.
Keep communication and measurement checks distinct
SMART communication and the analog reading answer different questions during testing. First, verify the current signal at each receiving system. Then check the required communication path using the documented terminal arrangement. In addition, confirm the loop resistance requirements. A correct analog value alone does not establish that the intended diagnostic access is working.
Capture the split-loop requirement for quotation
- Transmitter reference and wiring type.
- Two receiving destinations and their load data.
- Full .2O model, article number, and required quantity.
The product has published capability up to SIL 3 under manufacturer conditions. Keep any safety assessment tied to the complete loop, and request the supporting documents needed for the project or replacement file.
