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 model numbers below
for data sheets

API product brochure

Options & accessories

Cross reference

UL Approvals
API modules USA
API modules Canada
APD modules USA
APD modules Canada

Reference Info
Ground Loops
RFI / EMI
LoopTracker and Output Test
Sink vs Source

Applications

Monitoring motor speed with a PLC
Building heat SCR control
Manual override of computer control
Monitor pressure with a PLC
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
How to Order
  1. Select a model
  2. See data sheet for ordering info and power options
  3. See Price list
  4. 2-5 day typical lead time (USA customers)
  5. To place your order
Model Input/Output Features Product
DC to DC Signal Conditioners
Plug In Style

API 4300 G
API 4310 G

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
0-20 mA to 0-50 mA with HC output option

API 4310 G Narrow/Low Input
Specify input range
Factory configured
0-10 mV to 0-100 mV
±10 mV to ±100 mV
0-100 μA to 0-1 mA

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
I/O reversal available
  • Hot-swappable plug-in design
  • RepalcesAction 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 4310 G UL listed
API 4300 G, API 4310 G
DC to DC Signal Conditioners
Factory Configured
DIN Style

APD 4300
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
DC to DC Signal Conditioners
Plug In Style
Field Selectable Minuteman Setup

API 4380 G

24 Field configurable inputs
0-50 mV to 0-10 V
±5 V, ±10 V
0-1 mA to 0-20 mA, 4-20 mA

16 Field configurable outputs
0-1 V to 0-10 VDC
±5 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA

  • Minuteman one-minute setup
  • Hot-swappable plug-in design
  • Replaces Action AP4380, Wilkerson MM4380
  • 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 power



Api 4380G UL listed
API 4380 G
DC to DC Signal Conditioners
Field Selectable Minuteman Setup
DIN Style

APD 4380

53 field configurable input ranges
0-10 mVDC to 0-130 VDC
±5 mV to ±65 VDC
0-200 μA to 0-50 mADC

18 Field configurable output ranges
0-1 V to 0-10 VDC
±5 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Minuteman one-minute setup
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • 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

APD 4380UL approved
APD 4380
High Accuracy DC to DC Isolated Transmitter
Field Programmable I/O
DIN Style

APD 4381

54 field configurable input ranges
0-50 mVDC to 0-10 VDC
±25 mV to ±10 VDC
0-500 μA to 0-20 mADC
Custom input range available

18 field configurable output ranges
0-1 V to 0-10 VDC
±5 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Covers all common DC sensors
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • 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

APD 4381 UL approved New!
APD 4381
DC to DC Signal Conditoners
Plug In Style
Field Selectable Minuteman Setup

API 4385 G
24 field configurable inputs
-50-0 mVDC to 0-20 VDC, 20-40 VDC
0-200 μADC to 0-40 mADC, 10-50 mADC
Selectable zero offset

16 field configurable outputs
0-1 V to 0-10 V
±5 V, ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Minuteman one-minute setup
  • Hot-swappable plug-in design
  • 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 power


Api 4385G UL listed
API 4385 G
DC to DC Signal Conditoners with
High Voltage Input

Plug In Style
Field Selectable Minuteman Setup

API 4380 GHV3


24 field configurable inputs
0-1 VDC to ±200 VDC

16 field configurable outputs
0-1 V to 0-10 V
±1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA

  • Minuteman one-minute setup
  • Hot-swappable plug-in design
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • 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 power


Api 4380 GHV UL listed
API 4380 GHV3
High Voltage DC Input to DC Signal Conditioners
DIN style
Field Selectable Minuteman Setup

APD HV-DC

8 selectable input ranges
7 standard plus 1 factory set
0-100 VDC to 0-1200 VDC, and custom
specify custom range if required (2000 VDC max.)

18 selectable output ranges
0-1 V to 0-10 V,
±5 V, ±10 V,
0-2 mA to 0-20 mA, 4-20 mA,
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • DIN rail mount
  • 22.5 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD HV-DC
APD HV-DC
IsoSplitter® Signal Splitters
DC-DC Signal Isolator-Splitter

Factory Configured
22.5 mm DIN

APD 4930

APD 4930 Features
Specify input range
0-10 mVDC to 100 VDC
±50 mV to ±10 VDC
0-1 mADC to 0-50 mADC, 4-20 mADC

Specify output range for each channel
2 independent channels
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-25 mA, 4-20 mA
  • Removable plugs
  • Output LoopTracker LEDs
  • Selectable sink/source mA input
  • 15 V input loop power supplies
  • Sourcing mA output (sinking optional)
  • 20 V output loop power supplies
  • Sinking mA outputs optional
  • Output test/manual override terminals
  • Full I/O/power isolation
  • DIN rail mount
  • 22.5 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VAC/VDC power

APD 4930 IsoSplitternew
APD 4930 DC IsoSplitter
IsoSplitter® Signal Splitters
DC-DC Signal Isolator-Splitter

Factory Configured
DIN Style

APD 4393

Specify input range
0-10 mVDC to 100 VDC
±50 mV to ±10 VDC
0-1 mADC to 0-50 mADC, 4-20 mADC

Specify output range for each channel
2 independent channels
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-25 mA, 4-20 mA
  • Removable plugs
  • I/O LoopTracker LEDs
  • Selectable sink/source mA input
  • 15 V input loop power supplies
  • Selectable sink/source mA output
  • 20 V output loop power supplies
  • Output test button
  • Full I/O/power isolation
  • DIN rail mount
  • 45 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VAC/VDC power

Api 4393 DINUL approved
APD 4393 DC IsoSplitter
Universal Input to DC Signal Conditioners
Field Programmable I/O
DIN Style


APD 8000 Features

APD 8000 Datasheet
Field configurable inputs
DC volts: 35 ranges from ±25mVDC to ±10 VDC
DC mA sinking input, 20 ranges from ±0.5mADC to ±20mADC
Potentiometer: 100Ω min. to 1 MegaΩ max.
Thermocouple: J, K, T, E, R, S, N, B, C, D, G, M, N, P
RTDs: 2, 3, or 4 wire, 10Ω to 8000Ω RTDs
Thermistor: 44000 series, YSI 400, Spectrum
Custom input available

18 field programmable output ranges
Voltage: 0-1V, 0-2V, 0-4V, 0-5V, 1-5V, 0-8V, 0-10V, 2-10V,
±5V, ±10V
Current: 0-2mA, 0-4mA, 0-8mA, 0-10mA, 2-10mA, 0-16mA,
0-20mA, 4-20mA
Can be wired for sink or source
  • Switch and pushbutton setup
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD8000 UL approved new!
APD 8000
DC to DC Isolated Transmitter
Thin DIN Style

K109UI datasheet

K109UI installation
Field Configurable Input
Input: 0-20 mA, 4-20 mA,
0-5 VDC, 1-5 VDC, 0-10 VDC, 2-10 VDC,
0-15 VDC, 0-30 VDC

Field Configurable Output
Output: 4-20 mA, 0-20 mA, 20-4 mA, 20-0 mA,
0-5 V, 1-5 V, 0-10 V, 10-0 V

  • Only 6.2 mm wide
  • DIP switch configuration
  • Full 3-way isolation
  • Low cost
  • DIN rail mount without tools
  • Power: 19.2-30 VDC or K-SUPPLY+KBUS

UL Listed   CE logo 
K109UI
K109UI
DC to DC Isolated Transmitter
with Sink/Source Input

Thin DIN Style

K109S datasheet

K109S installation
Field Configurable Input
Input: 4-20 mA, 0-20 mA, 20-4 mA, 20-0 mA,
0-5 V, 1-5 V, 0-10 V, 10-0 V


Field Configurable Output
Output: 4-20 mA, 0-20 mA, 20-4 mA, 20-0 mA,
0-5 V, 1-5 V, 0-10 V, 10-0 V

  • Only 6.2 mm wide
  • DIP switch configuration
  • Full 3-way isolation
  • Low cost
  • DIN rail mount without tools
  • Power: 19.2-30 VDC or K-SUPPLY+KBUS


UL Listed CE logo 
K109S
K109S
Universal Input to 4-20 mA Loop Powered Isolator
Thin DIN Style

K121 datasheet

K121 installation
Field Programmable Input
Input: –150 mV to +150 mV
–30 V to +30V
–24 mA to 24 mA
RTD: Pt100, Pt500, Pt1000, Ni100
Thermocouple: J, K, T, E, R, S, B, N
Potentiometer: 500 Ω to 10 KΩ
Resistance: 1750 Ω

Output: 4-20 mA loop powered
Powered by the output loop

  • Only 6.2 mm wide
  • PC programmable configuration
  • Full 2-way isolation
  • Low cost
  • DIN rail mount without tools
  • Powered by 4-20 mA loop

  • CE logo  new  EX
K121
K121
DuoPak®
Two Channel Signal Conditioners

DIN Style

APD 2000 Series
Specify input range for each channel
Factory configured
APD 2000 Ch1: DC mV/V/mA Ch2: DC mV/V/mA
APD 2001 Ch1: DC mV/V/mA Ch2: RTD
APD 2003 Ch1: DC mV/V/mA Ch2: Potentiometer
APD 2005 Ch1: DC mV/V/mA Ch2: Strain gauge
APD 2006 Ch1: DC mV/V/mA Ch2: AC mV, V, mA
APD 2007 Ch1: DC mV/V/mA Ch2: Frequency

Specify output range for each channel
2 independent channels
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-25 mA, 4-20 mA

  • Optional I/O reversal
  • I/O LoopTracker LEDs
  • Selectable sink/source mA output
  • 20 V output loop power supplies
  • Output test buttons
  • Full I/O/power isolation
  • Removable plugs
  • DIN rail mount
  • 45 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D for 9-30 VDC, 10-32 VAC power
DuoPak UL approved
APD 2000 Series DC
DC to DC Signal Conditioners with
Math Functions

Plug In Style

API 4400 G - API 4408 G

API 4400 G: (A+B+C+D)/4
API 4401 G: (A+B+C)/3
API 4402 G: (A+B)/2
API 4403 G: (A+B+C–D)/3
API 4404 G: (A+B–C–D)/2
API 4405 G:  A–B–C–D
API 4406 G: (A+B–C)/2
API 4407 G:  A–B–C
API 4408 G:  A–B

Specify input ranges
Factory configured
Input negative is common
0-100 mV to 0-10 V
±100 mV to ±10 V
0-1 mA to 0-20 mA, 4-20 mA

Specify output range
Factory configured
0-1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Hot-swappable plug-in design
  • Direct replacements for Action AP 4400 series
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • Uses API-011 11-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 power



Api 4400G
API 4400 G to API 4408 G
Isolated Head-Mount Universal Transmitters
DIN Form B Style

T121 datasheet

T121 installation
Programmable
Input: Pt100 or Ni100, Pt500, Pt1000
J, K, R, S, T, B, E, N
Potentiometer
mVDC, VDC

Selectable Output
Output: 4-20 mA, 20-4 mA

  • Order T121-C for pre-programmed I/O
  • 44 mm dia
  • EASY-USB configuration
  • I/O isolation
  • Low cost
  • DIN B with 5.8mm (0.228"dia) center hole
  • Power: 7 to 30 VDC current loop

T121   CE logo  new

T121
EASY-USB
USB - UART TTL Converter

All accessories

EASY-USB manual

EASY-USB software
Programming kit for K121
Converter
Software mini CD (or download latest)
Adapter cable (std USB cable not included)
EASY-USB
EASY-USB

S315 and S315-IP66
4 Digit 4-20 mA Loop Powered Display

1/8 DIN

S315 and S315-IP66 datasheet

S315 and S315-IP66 installation
Loop Powered Display
Input: 4-20 mA
Display: 4 digit red LED

  • 1/8 DIN panel mount or IP66 housing
  • Scalable 4 digit display

CE logo  new!
S315
S315