User manual

SV21001a_e.doc / Jul-10 Page 8 / 11
2.4. The Incremental Outputs (X2 und X4)
On the terminal strips X2 and X4 the encoder information is available with a differential square
wave format. All incremental outputs use push-pull drivers. When position 2 (Com+) of the
corresponding terminal strip is unconnected, the output level is automatically adapted to
TTL / RS422 format. As soon as terminal position 2 receives any external voltage >5.5 volts,
automatically this voltage will determine the output swing. Consequently each of the two
incremental outputs can operate with its own specific TTL or HTL level.
123456789
GND
+5,2 V (Vcc int.)
GND
A
/A
B
/B
Z
/ZCom+GND
(Screen)
Sub-D-9
X2 / X4
X3
Positions 9 of the terminal strips X2 and X4 are in each case galvanically connected to the
metal housing of the adjacent Sub-D connector (located on the same side of the housing)
It is recommendable to connect the cable shield directly to the metal housing of the
associated counterpart connector, and to wire terminal position 9 to earth or ground
potential. This ensures that the cable shield is earthed / grounded correctly.