simatic s7-300 - megaelektrik.net
simatic s7-300 - megaelektrik.net
simatic s7-300 - megaelektrik.net
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4<br />
SIMATIC S7-<strong>300</strong><br />
Ex input / output modules<br />
Ex digital I/O modules<br />
■ Overview<br />
• I/O modules for applications within potentially explosive<br />
chemical plants<br />
• For connecting sensors and ac tuators from zones 1 and 2 in<br />
hazardous area installations<br />
• Associated electrical equipmen t [EEx ib] IIC in accordance<br />
with DIN 50020<br />
• For isolating non-intrinsically safe circuits of the programmable<br />
logic controller and the intrinsically safe circuits from the<br />
process<br />
■ Technical specifications<br />
6ES7 321-7RD00-0AB0<br />
Voltages and currents<br />
Load voltage L+<br />
- Rated value (DC) 24 V<br />
Current consumption<br />
• from load voltage L+ (no load), 50 mA<br />
max.<br />
• from backplane bus 5 V DC, max. 80 mA<br />
• Power dissipation, typical 1.1 W<br />
Connection system<br />
• Requisite front connector<br />
20-pin<br />
Digital inputs<br />
• Number of NAMUR inputs 4<br />
Length of cable<br />
- Length of cable unshielded, max. 200 m<br />
Input voltage<br />
- Rated value, DC 8.2 V; from internal circuit supply<br />
Input current<br />
- At broken wire, max. 0.1 mA<br />
- At short circuit, max. 8.5 mA<br />
• For NAMUR sensor<br />
- For 0 signal 0.35 to 1.2 mA<br />
- For 1 signal 2.1 to 7 mA<br />
Input delay (at rated value of the<br />
input voltage)<br />
- Input frequency<br />
2 kHz<br />
(at 0.1ms delay time), max.<br />
• for NAMUR inputs<br />
- parameterizable Yes; 0.1 / 0.5 / 3 / 15 / 20 ms<br />
(parametizable, plus 0.25 ms<br />
preparation time)<br />
Sensor supply<br />
• Output voltage<br />
via inputs<br />
6ES7 321-7RD00-0AB0<br />
Sensor<br />
Connectable encoders<br />
- NAMUR sensor Yes; Two-wire connection<br />
Ex(i)-modules<br />
Maximum values of the input<br />
circuits (per channel)<br />
- Ca (permissible external 3 µF<br />
capacity), max.<br />
- Io (short-circuit current), max. 14.1 mA<br />
- La (permissible external inductance),<br />
max.<br />
100 mH<br />
- Po (load power), max. 33.7 mW<br />
- Uo (output open-circuit voltage), 10 V<br />
max.<br />
Status information/ interrupts/<br />
diagnostics<br />
Diagnostics<br />
- Diagnostic information can be Yes<br />
read out<br />
Potentials/ electrical isolation<br />
Digital input functions<br />
- Electrical isolation,<br />
Yes<br />
digital input functions<br />
- between the channels,<br />
1<br />
in groups of<br />
Standards, approvals,<br />
certification<br />
• Type of protection to comply [EEx ib] IIC<br />
with EN 50020 (CENELEC)<br />
• Type of protection to comply CL.2, DIV 2, GP A,B,C,D T4<br />
with FM<br />
• PTB test number<br />
Ex-96.D.2094X<br />
Dimensions and weight<br />
• Weight, approx.<br />
230 g<br />
4/86 Siemens ST 70 · 2005
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