Precision Digital PD138 - Manual (Page 13)

PD138 Minimux
®
II Temp & Process Scanner Instruction Manual
13
4-20 mA Inputs
A special version of the Minimux
®
II is used to switch 4-20 mA signals.
PD138-X-CL versions have a built-in resistor network that eliminates
loop interruptions. The process meter must be setup for 1-5 V input and
the complete system should be calibrated together.
The PD6000’s internal transmitter power supply may be used to power
the transmitters. However, only the transmitter that is currently selected
will be powered and all others will not be powered. Care should be taken
to provide the transmitter with sufficient time to stabilize to provide an
accurate output.