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Interface module
7.6 Interface modules SU12 und SU13
7.6.1
Function description
Interface modules SU12 and SU13 are used to wire a ribbon cable connector X1 on
SIMATIC TDC side 1:1 to the terminal blocks X2 on plant side, with the exception of the
following terminals.
The following signal lines are fused at the terminals (0.5 A slow-blow, internal resistance
0.25 Ω):
Interface module
SU12
SU13
The following terminals have a protective diode (Schottky diode type Vishay BAT46) for the
24 V supply voltage of digital outputs in the following signal lines:
Interface module
SU12
SU13
A PTC resistor (internal resistance: 0.9 Ω, e.g. type Epcos B59910-C120-A70) element is
installed at the following terminals for short-circuit protection of the 24 V supply voltage of
digital outputs in the signal line:
Interface module
SU12
SU13
Process signals
The concept of the interface modules support signal flow on both sides. The process signals
are transferred without additional electrical isolation and signal preparation.
Table 7- 7
Voltage range
Current range
190
Maximum permissible voltage and current values for signal processing
Terminal block X2
Pin 1 – 8
Pin 8, 17 – 23, 26 – 33, 36 – 43, 46 – 48
Terminal block X2
Pin 10
Pin 10
Terminal block X2
Pin 9
Pin 9
The maximum permitted voltages of the modules to which the
interface modules are connected must be maintained.
Max. 0.5 A
System Manual, 12/2013, A5E01114865-07
SIMATIC TDC hardware
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