The LRS and LRD series of modules are commonly termed “Loop
Isolators”. They are typically connected into a current loop, in series, and repeat the 4-20mA on their output terminals, thus supplying a 4-20mA or 1-5Vdc signal to another load.

Features:

- Galvanic Isolation to 2500 Vrms.
- Compact Din Rail or G Rail Mounting.
- External Monitor Points (40-200mV).
- Self Tuning to connected load (automatic compensation for loop
  volts and load).
- EMI/RFI barrier, the LRS, LRD may improve interference
  from such sources.

Inputs:

- LRS – 4-20mA (Single)
- LRD – 4-20mA (Single or Dual) (may be linked for single
  input)
- OUTPUTS: LRS – 4-20mA or 1-5Vdc
- LRD – 2 x 4-20mA or 2 x 1-5Vdc or 1 x 4-20mA and 1 x
  1-5Vdc

See pdf for connection information