Datasheet

Ip251_02b_oi_e.doc / Dez-15 Page 7 / 28
4. Connections
4.1. SSI encoder, Master operation
2
3
8
9
4 (GND)
Clock-
Clock+
GND
Data-
Data+
SSI encoder
IP251 converter
Master mode
We recommend to connect the screen to GND and earth potential on both sites.
4.2. SSI encoder, Slave operation
With this mode, the IP251 converter operates in parallel to another unit, acting as a „listener“
to the existing data communication. Quite according to need, the common potential of the
master can be connected to terminal 4 (GND), or remain open for fully differential operation.
2
3
8
9
4 (GND)
IP251 converter
Slave mode
+ -
C
l
o
c
k
+
C
l
o
c
k
-
D
a
t
a
+
D
a
t
a
-
Encoder
Master
Clock-
Clock+
Data-
Data+
4.3. Hold input
A HIGH signal to this input freezes the parallel output data.
The Hold function becomes active 500 µs after the rising edge of the signal and remains active
for the duration of the signal. With PC setup, the polarity of the signal can be inverted (Falling
edge, active low, see register “Hold polarity”).
The Hold input provides PNP/HTL characteristics (LOW = open or 0 … 3 V, HIGH =10 … 30 V)