simatic s7-300 - megaelektrik.net

■ Overview
SIMATIC S7-300
Ex input / output modules
Ex analog I/O modules
• I/O modules for applications within potentially explosive
chemical plants
• For connecting sensors and ac tuators from zones 1 and 2 in
hazardous area installations
• Associated electrical equipmen t [EEx ib] IIC in accordance
with DIN 50020
• For isolation of non-IS circuits of the automation system and
the IS circuits from the process
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■ Technical specifications
6ES7 331-
7RD00-0AB0
6ES7 331-
7SF00-0AB0
Voltages and currents
Load voltage L+
- Rated value (DC) 24 V 24 V
Power supply of measuring
transducers
- Available Yes
- Rated value (DC) 13 V; at 22 mA
- Open-circuit voltage (DC) 25.2 V
Current consumption
• from backplane bus 5 V DC, max. 60 mA 120 mA
• from supply voltage L+, max. 150 mA
• Power dissipation, typical 3 W 0.6 W
Connection system
• Requisite front connector 20-pin 20-pin
Analog inputs
• Number of analog inputs 4 8; 8 x thermocouples,
4 x RTD thermistors
• Length of cable shielded, max 200 m 200 m;
HTC: 50 m
• Permissible input voltage for the 40 mA
current input (destruction limit),
max.
Input ranges (rated values),
currents
- 0 to 20 mA Yes
- 4 to 20 mA Yes
6ES7 331-
7RD00-0AB0
6ES7 331-
7SF00-0AB0
Analog inputs (continued)
Input ranges (rated values),
thermocouples
- Type B Yes
- Type E Yes
- Type J Yes
- Type K Yes
- Type L Yes
- Type N Yes
- Type R Yes
- Type S Yes
- Type T Yes
- Type U Yes
Input ranges (rated values),
resistance thermometer
- Ni 100 Yes
- Pt 100 Yes
- Pt 200 Yes
Analog value formation
• Measuring principle SIGMA-DELTA SIGMA-DELTA
Integration and conversion
time/triggering per channel
- with over-range (bits incl. sign),
max.
16 Bit;
10 to 15 bits +
sign
16 Bit;
10 to 15 bits +
sign
Yes;
2.5 to 100 ms
- Integration time parameterizable Yes;
2.5 to 100 ms
- Interference voltage suppression
10 to 400 Hz 10 to 400 Hz
for interference frequency f1
in Hz
Siemens ST 70 · 2005
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