Trumeter | Innovation by Design
Trumeter | Innovation by Design

7400AS 8 Digit Bi-Directional Electronic Totaliser

Trumeter 7400AS Electronic Totaliser

8 Digit, Low Power, Bi-directional Electronic Totaliser

The 7400AS is an 8 digit LCD bi-directional totalising counter for PCB mounting. It features a pushbutton reset on the front of the panel and operates from an external 3VDC supply. It is supplied with an electrical reset and features inputs  for count, direction and external reset.

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  • 8 digit high contrast LCD characters
  • Latest CMOS circuitry achieves an expected battery life of 10 years (1/2 AA 900mAH 3V lithium battery)
  • Remote reset facility
  • Leading zero blanking
  • Add/subtract counting of pulses up to 10kHz
  • Low speed contact closure input with integral de-bounce circuitry
  • CE, UL and cUL approved


PDF Instructions

CE Certificate

REACH, WEEE and RoHS Documentation


Supply Voltage

2.6 – 3.4VDC

Current Consumption

Less than 10µA, typically 5µA


8 digit, 8mm height, high contrast LCD characters with leading zero blanking

Electronic Count Input (1)

10kHz maximum, positive edge triggered, 0.7V threshold, 100µS minimum pulse length, TTL/CMOS Compatible

Low Speed Count Input (2)

Contact closure/open collector input, 30Hz maximum, negative edge triggered, 0.7V threshold, 25mS minimum pulse length

Reset Input (R)

Contact closure/open collector, negative edge triggered, 0.7V threshold, 15mS minimum pulse length

Direction Input (D)

Electronic input TTL/CMOS Compatible. Add=logic 1, Subtract=logic 0(0V)

Operating Temp

-10°C to +60°C

Storage Temp

-20°C to +70°C

Ordering Information

7400AS – Electronic Totaliser




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