Siemens SIMATIC TDC - Page 118

Signal modules
5.1 SM500 signal module
SIMATIC TDC hardware
118 System Manual, 08/2017, A5E01114865-AL
Digital inputs
Number
16
Electrical isolation
No
Input voltage
• Rated voltage
• For 0 signal
• For 1 signal
24 V
-1 V to + 6 V
+13.5 V to +33 V
Input current
• For 0 signal, normally
• For 1 signal, normally
0 mA
3 mA
Delay time per channel, max. 100 µs
Incremental encoder
Encoder types that conform to technical specifications may be connected to the incremental
encoder inputs.
Number
4
Connectable types Incremental encoders with 90º track
phase offset
Incremental encoders with separate
up/down tracks
Version Differential inputs,
selectable 15 V (HTL) or 5 V (TTL) encoder signal
Track signals
Tracks A, B with/without zero pulse
Up/down tracks
Phase difference of track signals, min.
200 ns
Pulse frequency, max.
1 MHz
2.5 MHz
Interference pulse suppression
Configurable
Electrical isolation
No
Input voltage
• 15 V – encoder:
– Valid range
– at 0 signal
– at 1 signal
• 5 V – encoder
– Valid range
– at 0 signal
– at 1 signal
-30 V to +30 V
-30 V to +4 V
+8 V to +30 V
-7 V to + 7 V
-7 V to –0.7 V
+1.5 V to +7 V
Input current
• 15 V – encoder (typ., abs.)
• 5 V – encoder (typ., abs.)
5 mA
1.5 mA
Monitoring output
Not available
Monitoring input
Specification as for digital inputs
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