Bts 1X0 Monitor/Keyboard Switch - HEIDENHAIN TNC 426 PB/M Technical Manual

3.20 BTS 1x0 Monitor/Keyboard Switch

X1, X2, X4,
X5 to X7: Monitor
and keyboard
connections
X3: Switching
between keyboards
X8: Supply voltage
for BTS 120
3 – 100
Two monitors (BTS 110: 2 x BC 120, BTS 120: 2 x BF 120) and two TE 420
keyboards can be connected to an LE with the BTS 1x0.
The two monitors are always active. Switchover between the two keyboard
units is realized by a 24 V switching input on the BTS 1x0.
With the BTS 110, the potentiometers of the current keyboard are active. With
the BTS 120, a jumper on the PCB is used to determine which potentiometers
should be active. The jumper is on the upper PCB next to the ID plate.
Jumper setting
Refer to the Sections "TNC Operating Panel" and "Visual Display Unit" for the
pin layouts of the individual connections.
Connection designation
X1
X2
X4
X5
X6
X7
Note
The interfaces comply with the requirements of EN 50 178 for "low voltage
electrical separation."
Depending on the signal at X3, one of the keyboards at X4 or X5 is activated:
Signal at X3
Terminal 1
0 V
+24 V
Pin layout on the BTS 120:
Connecting terminal
1
2
Active potentiometers
Always keyboard 1 (at X4)
Currently active keyboard
Monitor/Keyboard
Input BC 120 or BF 120
Input TE 420
1st output TE 420
2nd output TE 420
1st output BC 120 or BF 120
2nd output BC 120 or BF 120
Terminal 2
0 V
0 V
Assignment
+24 V
0 V
HEIDENHAIN Technical Manual TNC 426, TNC 430
Active keyboard
At X4
At X5