Trumeter | Innovation by Design
Trumeter | Innovation by Design


6 Digit Predetermining counter with a 5 digit rate meter.


The 878X is capable of displaying and controlling almost any count application. It has a dual relay output, which can be used to signal or control external devices or processes.


  • 14.2mm character high visibility LED display
  • 1/8 DIN (96mmX48mm) bezel
  • Simple user programming
  • Display scaleable to show engineering units
  • Programme lock out facility
  • AC and DC powered models available
  • Analogue re transmission option
  • RS485 communications option
  • CE approved. (UL and cUL pending)

PDF Instructions

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Power Supply

AC Powered 85-265VAC 47-63Hz 20VA.
DC Powered 9-30VDC 12VA.

Sensor supply

12VDC ±12% 75mA max.


14.2 mm character high visibility LED Display.

Signal Input

Sink(NPN) or Source(PNP) DIP switch selectable.


High 3.5 to 28VDC.
Low 0-1.9VDC for single ended signals.

Magnetic pick up range

200mV pk-pk to 65VRMS into 34.9 kO load.

Slow response

200Hz max.

Fast response

8.25kHz A or B, 3Khz A and B, QuadX1 and QuadX2 3.25kHz, QuadX4 2Khz.

Control Inputs

Sink(NPN) only (4.75kO to +5VDC) internal load.


High 3.5 to 28VDC.
Low 0-1.9VDC.

Response time

25msecs max (5V signal).

Optional Outputs

Relay output

2 SPCO (Form C) relays. Contact rating 5A 250VAC or 30VDC @ unity power factor.

Analogue retransmission

4-20mA (<750O load ) and 0-10VDC (> 2500O load).

RS485 Serial Communication

Baud rate 1200, 2400, 4800, 9600 or 19,200 programmable Parity Even, odd or no parity.



Data Retention

EEPROM 100years duration

Operating Temperature

0°C to 50°C.

Storage Temperature

-20°C to 70°C.


0 to 85%RH non condensing.


2.5g’s 30-200Hz.



Front Panel Protection

IP65 when properly mounted using gasket supplied.


CE approved. (UL and cUL pending).

Ordering information

8780 DC Powered Predetermining Counter
8781 AC Powered Predetermining Counter

Options – (Select & add to code 8780-?)

0 for No Options
1 for Dual Relay
3 for Dual Relay & Analogue Output
5 for Dual Relay & RS485 Comms
7 for Dual Relay, Analogue Output & RS485 Comms

e.g. 8780-1 = DC Powered Predetermining Counter with Dual Relay Option Board Fitted

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