February 2012 28 – 459
X125:
Slot for SIK
The system identification key is located in slot X125.
X141, X142,
X143, X144:
USB interface
Pin layout for USB connection (type A):
If a USB hub is connected to one of the USB ports, the maximum permissible length of the USB cable
is reduced to 20 m.
USB hub The power supply for the USB hub must comply with EN 50 178, 5.88 requirements for "low voltage
electrical separation."
X249:
Visual display unit
Pin layout:
USB connection (female) 4-pin Assignment
1+5 V
2USBP–
3USBP+
4GND
If USB components that are connected to one of the USB ports require more than 0.5 A, a separate
power supply becomes necessary for these components. One possibility is the USB hub (USB 2.0)
from HEIDENHAIN.
MC 6xxx, X249 Connecting
cable ID
625 901-xx
BF 2xx, X2
25-pin connection Assignment 25-pin connection Assignment
1TD2+ 1TD2+
2TD2– 2TD2–
3TD1+ 3TD1+
4TD1– 4TD1–
5TD0+ 5TD0+
6TD0– 6TD0–
7 TC+ 7 TC+
8 TC– 8 TC–
9 Do not assign 9 Do not assign
10 Do not assign 10 Do not assign
11 + 5 V 11 Do not assign
12 TxD+ 12 RxD+
13 TxD– 13 RxD–
14 TD2S 14 TD2S
15 Do not assign 15 EQSEL1
16 TD1S 16 TD1S
17 Do not assign 17 GND for EQSEL
18 TD0S 18 TD0S
19 Do not assign 19 EQSEL0
20 TCS 20 TCS
21 Do not assign 21 Do not assign
22 Do not assign 22 Do not assign
23 GND 23 GND
24 RxD+ 24 TxD+
25 RxD– 25 TxD–
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