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II - DCE FEL ČVUT v Praze

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SIMATIC S7 Ex Digital Modules<br />

Safety data (refer to Certificate of Conformity in<br />

Appendix A)<br />

Maximum values of output<br />

circuits (per channel)<br />

U0 (no-load output<br />

voltage)<br />

max. 25.2 V<br />

I0 (short-circuit<br />

current)<br />

max. 70 mA<br />

P0 (load power) max. 440 mW<br />

L0 (permissible<br />

external<br />

inductance)<br />

max. 6.7 m<br />

C0 (permissible<br />

external<br />

capacitance)<br />

max. 90 nF<br />

Um (error voltage) max. 60 V DC<br />

30 V AC<br />

Ta (permissible<br />

ambient<br />

temperature)<br />

max. 60C<br />

Data for actuator selection<br />

Outputs<br />

No-load voltage UA0<br />

Internal resistance RI<br />

Curve vertices E<br />

Voltage UE<br />

2-18<br />

Current IE<br />

Parallel connection<br />

of 2 outputs<br />

24 V DC 5%<br />

390 5%<br />

19 V DC 10%<br />

10 mA 10%<br />

For redundant<br />

activation of a load<br />

Not possible<br />

For increasing power Possible, see Manual<br />

“S7-300, M7-300, ET<br />

200M Automation Systems<br />

Principles of<br />

Intrinsically-Safe Design”<br />

Section“ Intrinsically-Safe<br />

Circuit with Two or More<br />

Items of Associated<br />

Electrical Apparatus”<br />

Switching frequency<br />

At resistive load 100 Hz<br />

At inductive load<br />

(L

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