HEIDENHAIN TNC 335 Technical Manual - Manual (Page 65)

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TNC 360 11 PLC inputs/outputs 8/95
11 PLC inputs/outputs
The HEIDENHAIN contouring control TNC 360 C has a capacity of max. 119 PLC inputs and 62 PLC
outputs.
55 PLC inputs and 31 PLC outputs can be connected directly to the logic unit. One PLC I/O board
(model PL 410 B or PL 410), with 64 PLC inputs and 31 PLC outputs, can be connected to the logic
unit.
11.1 Technical data
PLC inputs
Logic unit/ PL 410 PL 410 B PL 400
Potential range
”1” signal: U
i
13 V to 30.2 V 13 V to 30.2 V 16.5 V to 30 V
”0” signal: U
i
–20 V to 3.2 V –20 V to 3.2 V –20 V to 4 V
Current range
”1” signal: I
i
3.8 mA to 8.9 mA 2.5 mA to 6 mA 6.2 mA to12.6 mA
”0” signal: I
i
1.0 mA at U
i
= 3.2 V 0.65 mA at U
i
= 3.2 V 1.6 mA at U
i
= 4 V
PLC outputs
Transistor outputs with current limiting
Logic unit PL 410 B/ PL 410 / PL 400
Min. output potential
for ”1” signal
3 V below supply voltage
Nominal operating
current per output
0.1 A 1.2 A
Permissible load: resistive load, inductive load only with a quenching diode parallel to the inductance.
No more that half of the outputs may be switched on at simultaneously.
It is not permissible to short-circuit several outputs from the logic unit simultaneously.
A single short circuit does not cause an overload.