lifetime warranty
  • Lifetime Warranty on API Modules
  • LoopTracker ® Input LED
  • Alarm Status LEDs
  • Hot-Swappable Plug-In Design
  • User Adjustable Setpoint(s)
  • Push to Test/Reset Alarms
  • Full I/O/Power Isolation
Click on PDF links below
for product information

Frequency Input Alarm Trips


Factory Configured
API 1700 G  from $339
API 1720 G  from $369

Open Datasheet
Download Datasheet

Frequency Input Alarm Trips


Factory Configured
APD 1700  from $319
APD 1720  from $339

Open Datasheet
Download Datasheet

Zero Speed (Stall) Monitor


Factory Configured
STM156  call for quote

Open Datasheet
Download Datasheet

Literature and Links


API product brochure
Options & accessories
Cross reference
See all frequency transmitters
Regulatory Compliance page

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Specify input range
Factory configured
0-10 Hz to 0-30 kHz
Zero-based or offset up to 1/3 of maximum range
100 mV to 150 VRMS amplitude change
Input must be self-powered or externally powered
API 1700 G Single Alarm Trip
One DPDT contact set
Standard: HI alarm, normal acting,
set/reset adjustments, non-latching
See data sheet for alarm options
API 1720 G Dual Alarm Trip
Two SPDT contact sets
Standard: HI/LO alarms, normal acting,
two set/reset adjustments, non-latching
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
Specify input type
Frequency input
Low level sine or sawtooth (200mVpp - 20Vpp)
24VDC pulse external source (0.2 - 50VDC)
NAMUR proximity sensor or contact (8V)
3-wire NPN proximity sensor 15V auxiliary
3-wire PNP proximity sensor 15V auxiliary
3-wire NPN proximity sensor 24V auxiliary
3-wire PNP proximity sensor 24V auxiliary
2-wire 24VDC/AC proximity sensor 24V auxiliary
Specify output type and options
Adjustable trip point and delays
One or two relays
Trip speed delay time range
Start up delay time range
External control options

Reference Info


Alarm terminology
Deadband
Relay protection & EMI suppression
RFI/EMI
  • User adjustable setpoint(s)
  • 8 Amp contacts
  • Hot-swappable plug-in design
  • Input LoopTracker LED
  • Alarm status LEDs
  • Optional latching alarms
  • Optional band alarms
  • Output test button
  • Uses API-011 11-pin socket
  • 115 VAC powered
  • A230 option for 230 VAC
  • P option: 85-265 VAC, 60-300 VDC power (+$60)
  • D option: 9-30 VDC power (+$60)

  • 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, band alarm
  • 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

  • Input includes external pulse and any type of speed sensor
  • Relay contact output
  • Front adjustments for trip speed and start-up delay
  • Status LED
  • Full I/O/power isolation
  • Universal power options: 8 VDC to 280 VAC
Typical applications include
  • Under speed alarm
  • Broken conveyor belt alarm
  • Machinery jam alarm
  • Stalled motor alarm
Phone: 800-942-0315 or 847-918-3510    Fax: 800-949-7502 or 847-968-4891
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