It is possible to convert a 4-20mA FC100-03 to a pulse Open Collector FC100-01 in the field. Below are the hardware, wiring and programming instructions to make the changes. Please see the image of an FC100-03 and FlowCom board drawing below for reference.
- Remove the 4-20mA protection board (EB420). The red/black wires to the main board and the red/black wires from the output cable will no longer be needed along with the black wire tied to the FC100 base.
- The white and green wires will be moved from terminals COM and N.O. to OC+ and OC- respectively. The brown wire on terminal N.O. will not be needed.
- In the programming menu make the following changes: Set 20mA-FS to 00000. Set PLS-type to OC.
The above changes are all that should be needed to convert to an FC100-01. The pulse output increment can be programmed as needed. These are the PLS-un, PLS-dp, and PLS-inc parameters.