Trumeter HED261 Manual De Instrucciones página 2

Specification
Display
8 digit, 8mm high contrast LCD
characters
Current consumption
Counting 6μA, standby 3μA,
backlight 40mA max
Operating Temperature
0°C to +50°C
Storage Temperature
-20°C to +70°C
Supply voltage (pin 1)
2.7 – 3.3VDC
Low Speed Count Input (pin 2)
Contact closure/open collector input,
30Hz max, negative edge triggered,
0.7V threshold 18V max, 15mS min.
pulse length
This counter is in two variants, HED261-R with reflective display and HED261-T with LED
backlight. Connection is via 2 sets of 3 pins at 0.1 inch pitch, spaced as shown.
The unit is fixed to the panel using the two spring clips which are integral to the housing.
The unit is the correct way up when the pins are at the bottom.
It can be powered from a higher DC voltage using the external circuit shown. For a 5v
supply omit the regulator. Use the regulator for a supply in the range 8 - 30v. The
regulator accommodates the different current requirements for the reflective and backlight
models.
Note:
This product is ideally suited to battery powered applications. Should the product be used
in a circuit where an external power source is used, then the complete system will require
separate approval to meet the CE standards.
Any signal cables connected to this device must not exceed 30 metres in length.
If signal cables are installed that are routed outside the building, it will be necessary to
install additional surge protection devices.
Backlight
green: 9V or 5V
*
6
+9V
5
0V
* 120Ω 1/2W
1.800.544.2843
2
Electronic Count Input (pin 3)
Reset Input (pin 4)
Common (pin 5)
Backlight (pin 6) (optional)
6
+5V
5
0V
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15
10 20
5 25
0 30
10kHz max, positive edge triggered,
0.7V threshold, 18V max, 50μS min.
pulse length, TTL/CMOS compatible.
Contact closure/open collector, negative
edge triggered, 0.7V threshold 18V
max, 15mS min. pulse length
Supply 0V and signal common.
9V or 5V: see below
blue: 9V only
6
+9V
5
0V
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