The HED 251-T is a 4-digit totalising counter designed for either direct PCB mounting or panel mounting. These miniature electronic counters are 24mm x 48mm in size and are ideal for contact closure and reed switch signal inputs. As a result they are suitable for a range of OEM applications.
2.7 – 3.3 VDC
4 digit black LCD with 10mm characters and leading zero blanking
Contact closure open collector input. 10Hz max, negative edge triggered, 0.7V threshold 1.8V max and 25mS min pulse width
Negative edge triggered, 0.7V threshold, 15mS minimum pulse length and TTL/CMOS Compatible
-10°C to +50°C
-20°C to +70°C
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