Sv211_01c_oi_e.doc / Apr-16
Page 7 / 9
3.2.
Connection of the SinCos Encoder (X5)
The encoder can be connected via the front SUB-D-9 connector marked X5 (male connector on
unit side, female connector on the encoder cable). Only encoders with differential SinCos
signals of 1 Vpp can be used (0.8 Vpp - 1.2 Vpp). At any time the signals SIN+ / SIN- and COS+
/ COS- must be available. Where an additional reference marker pulse is used, also the signals
REF+ / REF- must be applied.
Pins 4 (+) and 5 (-) of the SUB-D-connector provide an auxiliary power output for the encoder
supply. When terminals 1, 2 of the front X6 connector is unconnected, the aux. output voltage is
automatically about 5.2 V (max. 150 mA). Where the encoder requires another supply voltage
(e.g. 24 V), an appropriate voltage can be applied remotely to terminal X6 (1,2).
Please note that the metallic housing of the SUB-D input connector is internally connected to
the common GND potential of the unit.
cos+
sin-
sin+
GND
ref-
ref+
cos-
1
2
3
4
5
9
8
6
7
(nc)
1
2
X6
Encoder supply
GND
+5,2 V (Vcc int.)
X5
*)
*)
*) All differential lines (SIN+ / SIN-, COS+ / COS-, REF+ / REF-)
are internally terminated by 120 ohms load resistors
3.3.
The Sine-Cosine Outputs (X1, X2, X3 und X4)
All SUB-D-outputs provide an image of the SinCos input signals, however with a fixed offset
voltage of 2.5 V with respect to GND. This allows a clean and trouble-free distribution of the
input signal to four target units.
cos+
sin-
sin+
GND
ref-
ref+
cos-
1
2
3
4
5
9
8
6
7
(nc)
(nc)
X1 / X2 / X3 / X4
Sub-D-9 female
It is mandatory to use cables with pairwise twisted wires for all sinusoidal signals
SIN+ / SIN-, COS+ / COS- and REF+ / REF-.
For signal transmission the target unit must provide terminating resistors at the end
of the signal line (in each case 120 ohms between and signal-)
Since on the inputs the unit already uses in-built termination resistors, no further
measures must be taken on the encoder side.
It is recommendable to connect the cable shield directly to the metal housing of the
associated counterpart connector. This ensures that the cable is connected with the
GND potential in any case via SV211.
