Excerpt from the technical data sheet: Technical characteristics WE77/Ex-1 230V
| Main Features | ||
|---|---|---|
| Signal type | Digital input | |
|
Supply |
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| Connection | terminals 11, 12 | |
| Nominal voltage | 198...253 V AC; 45...65 Hz | |
| Power dissipation | 1.6 W | |
| Power consumption | approx. 2.3 VA | |
|
Entrance |
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| Connection side | side of the field | |
| Connection | terminals 1-, 2+ | |
| Nominal values | according to EN 60947-5-6 (NAMUR), for electrical characteristics see manual | |
| Open circuit voltage/short circuit current | approx. 8 VDC / approx. 8 mA | |
| Switching point/switching hysteresis | 1.2 ... 2.1 mA / approx. 0.2 mA | |
| Pulse/pause ratio | min. 0.5 ms/min. 0.5 ms | |
| Line fault detection | open circuit I ≤ 0.1 mA | |
|
Exit |
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| Connection side | control side | |
| Connection | terminals 7, 8, 9 | |
| Exit | signal; relay | |
| Contact loading | 253VAC/2A/500VA/cos φ min. 0.7; 125VAC/4A/500VA cos φ min. 0.7; 40VDC/2A/80W, ohmic load | |
| On/Off Delay | OK. 10 ms / approx. 20 ms | |
| Mechanical life | 10 7 switching cycles | |
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Transmission characteristics |
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| Switching frequency | < 10 Hz | |
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Galvanic isolation |
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| Input, output | reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V eff. | |
| Input/Power | reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V eff. | |
| Output/Power | Basic insulation according to IEC/EN 61010-1, rated insulation voltage 300 V eff. | |
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Indicators/settings |
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| Display elements | LED | |
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Compliance with the directive |
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| Electromagnetic compatibility |
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Directive 2014/30/EU | EN 61326-1:2013 (industrial premises) |
| Low voltage |
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Directive 2014/35/EU | EN 61010-1:2010 |
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Correspondence |
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| Degree of protection | IEC 60529 | |
|
Environmental conditions |
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| Ambient temperature | -20 ... 60 °C (-4 ... 140 °F) | |
|
Mechanical characteristics |
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| Degree of protection | IP20 | |
| Connection | screw terminals | |
| weight | approx. 390 g | |
| Dimensions | 40 x 104 x 110 mm (1.6 x 4.1 x 4.3 in) (W x H x D), case type W1 | |
|
Data for use in hazardous areas |
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| EU Type Examination Certificate | PTB 02 ATEX 2065 | |
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Marking |
 II (1)GD [EEx ia] IIC [circuit(s) in zone 0/1/2]
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Entrance | Ex iа |
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Voltage | 13.4 VDC |
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Current | 31 mA |
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Power | 145 mW (trapezoidal characteristic) |
| Supply |
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Maximum safe voltage | 253 VAC (Caution: Nominal voltage may be lower.) |
| Exit |
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Maximum safe voltage | 253 VAC (Caution: Nominal voltage may be lower.) |
| Galvanic isolation |
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Input, output | safe electrical insulation in accordance with IEC/EN 60079-11, peak voltage 375 V |
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Input/Power | safe electrical insulation in accordance with IEC/EN 60079-11, peak voltage 375 V |
| Compliance with the directive |
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Directive 2014/34/EU | EN 60079-0:2012+A11:2013, EN 60079-11:2012 |