Analog DC to Frequency or Pulse 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 model numbers below
for data sheets
Literature and Links

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

Remote tank water level
Flow meter auto select
Monitor and totalize flow
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 Frequency Transmitters
Plug In Style
Field Selectable Minuteman Setup

API 7500 G
API 7500 G SS

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 Transmitters
Field Selectable Minuteman Setup
DIN Style

APD 7500
APD 7500 SS


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