HEIDENHAIN TNC 306 Technical Manual - Manual (Page 65)

3–50
TNC 416/TNC 406/TNC 306 PLC inputs/outputs 3/99
11 PLC input s/outputs
The HEIDENHAIN contouring control TNC 416/TNC 406 has a capacity of max. 56 PLC inputs and 31
PLC outputs, the TNC 306 has a capacity of max. 55 PLC inputs and 31 PLC outputs.
These, PLC inputs and PLC outputs can be connected directly to the logic unit.
In addition, one PLC I/O-board PL 410 B, with 64 PLC inputs and 31 PLC outputs, can be connected
to the logic unit.
11.1 Technical data
PLC inputs
PL 410B/logic unit
Potential range:
”1”-signal: Ue
13 V to 30.2 V
”0”-signal: Ue –20 V to 3.2 V
Current range:
”1”-signal: Ie
3.8 mA to 8.9 mA
”0”-signal: Ie 1.0 mA at Ue = 3.2 V
PLC outputs
Open-collector outputs with current limiting
Logic unit PL 410B
Min. output potential
for ”1”-signal
3 V below supply voltage
Nominal operating
current per output
0.1 A 1.2 A
Danger to internal components!
Connect inductive loads only with a quenching diode parallel to the inductance.
It is not permissible to short-circuit more than one output from the logic unit simultaneously.
A short-circuit of one output will not cause an overload.