Analog DC to DC Signal Conditioners, Converters,  Isolators, Transmitters

lifetime warranty
  • Lifetime Warranty on API Modules
  • LoopTracker® LEDs
  • Hot-Swappable Plug-In Design
  • Zero and Span Output Calibration
  • Push to Test Output
  • Full I/O/Power Isolation

Click on PDF links below
for product information

Literature and Links

API product brochure
Options & accessories
Cross reference
Regulatory Compliance page

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Reference Info
Ground Loops
LoopTracker and Output Test
Sink vs Source


Monitoring motor speed with a PLC
Building heat SCR control
Manual override of computer control
Monitor pressure with a PLC
Control & monitor with one flow meter
Monitor product moved by conveyor
Pharmaceutical process validation
Dam bubbler
SCR drive voltage
Blower speed
DC motor voltage and current
DC motor current
Bindicator level xmtr to PLC
Special API4300 for engine speed
Contol conveyor material
Sewage pumping stations
Hydraulic fracking control
Anemometer interface to PLC
Special API4300 for engine speed

How to Order

  1. Select a model
  2. See data sheet for ordering info and options
  3. Note that options affect pricing
  4. Request a quote via chat or call us
  5. 2-5 day typical lead time + shipping time
  6. 5-10 day lead time for quantities of 5 or more + shipping time
  7. To place your order
Model Input/Output Features Product

DC to DC Isolated Signal Conditioners

Factory Configured

API 4300 G  from $299

Open Datasheet
Download Datasheet
API 4300 G
Specify input range
Factory configured
0-100 mVDC to 0-500 VDC
±100 mVDC to ±10 VDC
0-100 μADC to 0-900 mADC

Specify output range
Factory configured
0-1 V to 0-10 V
±1 V to ±10 V
0-1 mA to 0-20 mA, 4-20 mA

  • Hot-swappable plug-in design
  • Replaces Action AP 4300
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • 18 V loop power supply
  • Uses API-008 8-pin socket
  • 115 VAC powered
  • A230 option for 230 VAC
  • P option for 85-265 VAC, 60-300 VDC power
  • D option for 9-30 VDC

API 4300 G UL listed
API 4300 G

DC to DC Isolated Signal Conditioner

Factory Configured

APD 4300  from $309

Open Datasheet
Download Datasheet
APD 4300
Specify input range
0-100 mVDC to 0-300 VDC
±100 mVDC to ±10 VDC
0-1 mADC to 0-1000 mADC, 4-20 mA

Specify output range
Factory configured
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-20 mA, 4-20 mA
I/O reversal available

APD 4300 PLC
Input range: 4-20 mA

Output range: 4-20 mA
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • Output test terminals for manual override capability
  • Full I/O/power isolation
  • Selectable I/O sink/source
  • 15 V input loop power supply
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power
  • Correct sink-sink or source-source mismatches
  • Isolate single-ended inputs
  • Eliminate PLC/DCS ground loops
  • Use with Allen Bradley, GE/Fanuc, IDEC,
    Omron, Mitsubishi, Modicon, Siemens,
    Panasonic, Honeywell analog inputs

APD 4300UL approved
APD 4300