QLPI731 - Quad Loop Powered Isolator

Product Diagram

The QLPI731 is a four channel loop powered isolator that combines signal isolation and conversion in one compact package. Due to its width of only 15mm per channel and the 35mm DIN-Rail mounting the QLPI731 is an a "space saver" in larger control cabinets.

The base unit features selectable process inputs, range changing is achieved using internal solder pads. Standard output is 4 - 20mA with a wide supply range of 7.5 to 38Vdc enabling 12V battery supply in automotive applications.

Double surge protection is standard with all series 700 loop powered transmitters to prevent failure due to spikes induced by DC switched inductive loads. Final calibration is trimmed using internal zero and span trim adjustments. Front mounted LEDs verify the function of each channel.



Most drawings are supplied in PDF format. Portable Document Format is used to present documents in a manner independent of application software, hardware, and operating systems.


Lead Time for a Traditional Product


Traditional products usually contain the same functionally as standard and premier products but have a different connection, part number or specifications. Traditional products are still available as a service to our customers that have them specified in their plants. Delivery is typically 7 days.

Stock Variants

Stock variants usually ship in 1 day.
Outputs 1-4 4 - 20mA
Input 1 4 - 20mA
Input 2 4 - 20mA
Input 3 4 - 20mA
Input 4 4 - 20mA

Order Processing


APCS makes and customises products according to a customers order. Upon receipt of the customers order the following information is required before manufacture, allocation or deliver until full details are given, these include;

  1. Identity of purchaser. Company name, ABN (Australian companies), street address and accounts email address.
  2. Required delivery address.
  3. Full part number and calibration detail required to manufacture items.
  4. Total on purchase order to include delivery charges. Orders received with missing information will be entered and marked to indicate missing details and returned to the customer for correction or approval.

Compliance with the above ensures that your items are manufactured and delivered according to the required specifications.

Standard delivery times commence after the order has been approved for processing.