Data Retention; Display; Prescaler; Ambient Conditions/Safety Regulations - Hengstler signo 721 Benutzerhandbuch

Contact type 1 x changeover or 2 x normally open
Contact guard circuit Varistor 250 V / 0.25 W
Maximum switching
voltage 30 V DC = / 250 V AC ~
Maximum switching
current 1 A
Maximum switching
capacity low induction, 30 W / 250 VA
Minimum
switching load 100 mA / 20 V
≥ 5 ms
Relay response delay
Electronic outputs Output current 50 mA max.,
not short-circuit proof

9.1.5 Data retention

Data are retained in a non-volatile
memory
Write cycles > 100.000
Read cycles unlimited
Data retention > 10 years

9.1.6 Display

Type 7-segment LED, suppression of
leading zeros,
programmable decimal point
Display colour red
Number of digits 5
Digit height 7 mm
Indicator LED's 3 / 4

9.1.7 Prescaler

4-digit factor 0.001 ... 9.999 remainder not taken
into consideration
Sach-Nr. 2 721 091; Version 1250100MW

9.1.8 Ambient conditions/safety regulations

Operating temperature O °C ... + 50 °C
Storage temperature - 20 °C ... + 70 °C
Climatic conditions
(DIN 40 040) 40 °C / 92 % rel hum.
System of protection,
connections IP 20
System of protection,
front IP 54
Hand contact safety VDE 0106 / VDE 0113
Front side (keypad) IP 54, according to DIN 40 050
Vibrostability 30 m/s
to IEC 068-2-6
Shock stability 100 m/s
to IEC 068-2-27
Drop test (packed) 800 mm dropt heigt according
to DIN/ISO 2248
Safety regulations according toVDE 0411
Protection class II
Contamination level 2, according to VDE 0110
Interference immunity Severity 3, according to IEC 801 T2 + T4
2 , 50 - 500 Hz, according
2 , (10 ms), according
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