Frequency or Pulse to Analog DC Signal Converters and Transmitters

lifetime warranty
  • Lifetime Warranty on API Modules
  • LoopTracker® I/O 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
RFI/EMI
LoopTracker and Output Test
Sink vs Source

Applications


Remote monitoring of motor speed
HVAC variable air volume control
Hall-effect flow sensor
Auto-ranging flow meter
Control and record water flow
Isolate & convert flow meter signal
Isolate & convert gas flow meter signal

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

Frequency Input Alarm Trips


Factory Configured

API 1700 G  from $309

Open Datasheet
Download Datasheet
Specify input range
Factory configured
0-10 Hz to 0-20 kHz
100 mV to 150 VRMS amplitude change
Input must be self-powered or externally powered

API 1700 G Alarm Trip
One DPDT contact set
Standard: HI alarm, normal acting,
adj. deadband, non-latching
See data sheet for alarm options

  • User adjustable setpoint(s)
  • 8 Amp contacts
  • Hot-swappable plug-in design
  • Input LoopTracker LED
  • Alarm status LEDs
  • Optional low alarm
  • Optional reverse acting
  • Optional latching alarm
  • Output test button
  • 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 1700G
API 1700 G

Frequency Input Alarm Trips


Factory Configured

APD 1700  from $289
APD 1720  from $309

Open Datasheet
Download Datasheet
Specify input range
Factory configured
0-25 Hz to 0-20 kHz
100 mV to 150 V RMS
Any waveform with minimum 100 mV amplitude change
Use with 2 wire, 3 wire NPN or PNP sensors

APD 1700 Single Alarm Trip
Dual SPDT contact sets
Standard: HI alarm, non-latching, normal acting
See data sheet for alarm options

APD 1720 Dual Alarm Trip
2 independent SPDT contact sets
Standard: HI/LO alarms, non-latching, normal acting
See data sheet for alarm options

  • Input sensitivity adjustment
  • 15 VDC sensor power available
  • User adjustable setpoint(s)
  • User adjustable deadband(s)
  • 8 Amp SPDT contacts
  • Input LoopTracker LED
  • Alarm status LEDs
  • Alarm options: LO, HI/HI, LO/LO
  • Optional reverse acting
  • Optional latching alarms
  • Push to test/reset
  • Remote push to test/reset
  • Full I/O/power isolation
  • Removable plugs
  • DIN rail mount without tools
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD 1700 UL approved
APD 1700, APD 1720

Frequency to DC Isolated Signal Conditioner


Factory Configured

API 7010 G  from $369

Open Datasheet
Download Datasheet
Specify input range
Factory configured
0-25 Hz to 0 to 20 kHz
100 mV to 150 VRMS amplitude
Sensor power supply available

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
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • Uses API-008 8-pin socket
  • Lifetime warranty
  • 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 7010G UL listed
API 7010 G

Frequency to DC Isolated Signal Conditioner


Factory Configured

APD 7010  from $339

Open Datasheet
Download Datasheet
Specify input range
Factory configured
0-25 Hz to 0 to 20 kHz
100 mV to 150 VRMS amplitude
Sensor power supply available

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

  • Accepts most frequency & prox sensors
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 15 V sensor 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


APD7010UL approved
APD 7010

DC to Frequency Isolated Signal Conditioners


Field Selectable Minuteman Setup


API 7500 G  from $379
API 7500 G SS  from $379

Open Datasheet
Download Datasheet
24 field configurable inputs
0-50 mVDC to ±10 VDC
0-1 mADC to 0-20 mADC

API 7500 G DC to Frequency Transmitters
30 field configurable outputs
Low range: 0-100 Hz to 0-1500 Hz
High range: 0-2 kHz to 0-30 kHz
MOSFET output std., TTL optional

API 7500 G SS DC to Low Frequency Transmitters
30 field configurable outputs
Low range: 0-1 Hz to 0-15 Hz
High range: 20 Hz to 300 Hz
MOSFET output std., TTL optional

  • 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
  • Lifetime warranty
  • 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 7500G UL listed
API 7500 G, API 7500 G SS
Socket sold separately

DC to Frequency Isolated Signal Conditioners


Field Selectable Minuteman Setup


APD 7500  from $355
APD 7500 SS  from $355

Open Datasheet
Download Datasheet
24 field configurable inputs
0-50 mVDC to ±10 VDC
0-1 mADC to 0-20 mADC

APD 7500 DC to Frequency Transmitters
30 field selectable outputs
Low range: 0-100 Hz to 0-1500 Hz
High range: 0-2 kHz to 0-30 kHz
MOSFET output std., TTL optional
Can be wired for MOSFET or TTL output
50% duty cycle square wave output

APD 7500 SS DC to Low Frequency Transmitters
30 field selectable outputs
Low range: 0-1 Hz to 0-15 Hz
High range: 20 Hz to 300 Hz
Can be wired for MOSFET or TTL output
50% duty cycle square wave output

  • Setup via rotary switches & easy-to-use tables
  • 1200 V full isolation input/output/power
  • Adjustable low frequency cutout
  • Input and output LoopTracker® LEDs
  • Output test button with remote test capbility
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

Apd 7500UL approved
APD 7500, APD 7500 SS

Frequency to DC Isolated Signal Conditioner


Field Selectable Minuteman Setup


APD 7580  from $355

Open Datasheet
Download Datasheet
30 field configurable input ranges
Low range: 0-100 Hz to 0-1500 Hz
High range: 0-2 kHz to 0-30 kHz
100 mV to 150 VRMS amplitude
Sensor power supply available

16 field configurable outputs
0-1 V to 0-10 VDC
±1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Accepts most frequency & prox sensors
  • Minuteman one-minute setup
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 15 V sensor 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

APD7580 UL approved
APD 7580

Frequency to DC Isolated Signal Conditioner


Field Selectable Minuteman Setup


API 7580 G  from $379

Open Datasheet
Download Datasheet
30 field configurable input ranges
Low range: 0-100 Hz to 0-1500 Hz
High range: 0-2 kHz to 0-30 kHz
100 mV to 150 VRMS amplitude
Sensor power supply available

16 Field configurable outputs
0-1 V to 0-10 VDC
±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
  • Lifetime warranty
  • 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 7580 G UL listed
API 7580 G
Socket sold separately

IsoSplitter® Frequency Signal Splitter
1 Frequency Input to 2 DC Outputs


Factory Configured

APD 7393  from $499

Open Datasheet
Download Datasheet
Specify frequency range
Factory Configured
10-25 Hz to 0-20 kHz
100 mV to 150 VRMS amplitude
Sensor power supply available

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
  • One frequency input
  • Two isolated DC output channels
  • 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

Frequency IsoSplitterUL approved
APD 7393 Frequency IsoSplitter



DuoPak® 2 Channel Isolated Signal Conditioners


Factory Configured

APD 2000 Series  from $519

Specify input range for each channel

APD 2007 Ch1: DC mV/V/mA Ch2: Frequency
APD 2017 Ch1: RTD Ch2: Frequency
APD 2037 Ch1: Potentiometer Ch2: Frequency
APD 2057 Ch1: Strain gauge Ch2: Frequency
APD 2067 Ch1: AC mV/V/mA Ch2: Frequency
APD 2077 Ch1: Frequency 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

DuoPakUL approved
APD 2000 Series Frequency

4 Digit 4-20 mA Loop Powered Display


Field Rangeable


S315  $139 *in stock*
S315-IP66  $300

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Loop Powered Display
Input: 4-20 mA
Display: 4 digit red LED

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

CE logo  new!
S315
S315