Absolute encoders - SSI
Shaft with clamping or synchro flange
Optical multiturn encoder 13 bit ST / 12 bit MT
GXP2W - SSI
Terminal significance
Terminal assignment
UB
Encoder voltage supply.
Connector
Pin 1
Core colour Assignment
violet Data+
brown/white Data-
green/white
yellow/white TxD
GND
Data+
Encoder ground connection relating to UB.
Positive, serial data output of differential
linedriver.
Pin 2
Pin 3
–
Data-
Negative, serial data output of differential
linedriver.
Pin 4
Pin 5
grey/white
pink/white
blue/white
red/white
RxD
Clock+
Positive SSI clock input.
Pin 6
Clock+
Clock-
Output 1
Output 2
Clock+ together with clock- forms a current
loop. A current of approx. 7 mA towards
clock+ input means logic 1 in positive logic.
Pin 7
Pin 8
Clock-
Preset
Negative SSI clock input.
Pin 9
black/white
Clock- together with clock+ forms a current
loop. A current of approx. 7 mA towards
clock- input means logic 0 in positive logic.
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
green/brown Output 3
green/grey
blue
Output 4
GND
Preset input for setting a preset anywhere
within the programmed encoder resolution.
The preset operation is triggered by a High
impulse and has to be in line with the
selected rotating direction UP/DOWN.
Connect to GND for maximum interference
immunity. Impulse duration >100 ms.
yellow
brown
red
Preset
UP/DOWN
UB
pink
GND-PRG
Please use cores twisted in pairs (for
example clock+ / clock-) for extensi-
on cables of more than 10 m length.
UP/DOWN
UP/DOWN counting direction input.
1
11
This input is standard on High. UP/DOWN
means ascending output data with clock-
wise shaft rotation when looking at flange.
UP/DOWN-Low means ascending values
with counterclockwise shaft rotation when
looking at flange. The rotating direction
may also be altered by programming.
2
12
10
13
14
16
3
9
15
4
8
5
7
6
TxD
RxD
Encoder transmitter output for RS232
programming interface.
Trigger level
SSI
Circuit
Encoder receiver input for RS232 program-
ming interface.
SSI-Clock
SSI-Data
Optocoupler
Linedriver RS485
Outputs 1, 3, 4 Special outputs.
Optional assignment to special functions.
Output less funcion.
Control inputs
Input level High
Input level Low
Input resistance
Input circuit
>0.7 UB
<0.3 UB
10 kΩ
Output 2
There must not be any external circuit.
GND-PRG
Separate ground for programming inter-
face.
www.baumerivo.com
3
