Siemens SIMATIC TDC - Page 117

Signal modules
5.1 SM500 signal module
SIMATIC TDC hardware
System Manual, 08/2017, A5E01114865-AL
117
Integrating analog inputs
Number
4
Version
Differential inputs
Electrical isolation
No
Input voltage range
-10 V to +10 V
Resolution
Depending on the integration time,
e.g. 15 bits for a 4 ms integration time.
Integration time per channel, max
Configurable
Tolerance
Integral linearity error, max.
Gain error, max.
Typical offset error
0.05%
1%
2 LSB (software adjustment)
Input resistance
470 kΩ
Input filter
2 kHz
Reverse polarity protection
Yes, as differential inputs are used
Digital outputs
Number
16
Electrical isolation
No
External power supply
• Rated voltage
• Perm. area
• short-term
• Current consumption, max., no load
24 V
20.4 V to 28.8 V
35 V (for max. 0.5 s)
40 mA
Output voltage range
• With 0 signal, max.
• With 1 signal, min.
3 V
ext. Supply voltage – 2.5 V
Output current
• With 0 signal, min.
• at 1 signal
– Rated value
– Valid range, max.
-20 µA
50 mA
100 mA
Delay time
100 µs
Switching frequency of outputs
With resistance load, max.
6 kHz
Short-circuit protection to
• Ground
• External power supply
yes
No
Short-circuit current, max.
250 mA
Total current of outputs (up to 60 °C)
16 x 50 mA
Limiting of inductive cut-off voltages
ext. Supply voltage +1 V
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