Absolute encoders - SSI
Hollow shaft max. ø50.8 mm
Optical multiturn encoder 13 bit ST / 12 bit MT
G1M2H, G2M2H - SSI
Terminal significance
Terminal assignment
UB
Encoder voltage supply.
Connector
Pin 1
Core colour Assignment
GND
Data+
Encoder ground connection relating to UB.
brown
black
blue
UB
Positive, serial data output of differential
linedriver.
Pin 2
GND
Pin 3
Clock+
Data+
Zero setting
Data-
Data-
Negative, serial data output of differential
linedriver.
Pin 4
beige
green
yellow
violet
Pin 5
Clock+
Positive SSI clock input.
Pin 6
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
Clock-
Pin 8
brown/yellow DATAVALID
pink UP/DOWN
black/yellow DATAVALID MT
Clock-
Negative SSI clock input.
Pin 9
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
–
–
–
–
Zero setting
Input for setting a zero point anywhere
within the programmed encoder resolution.
The zero setting operation is triggered by a
High impulse and has to be in line with the
selected direction of rotation (UP/DOWN).
Connect to GND after setting operation for
maximum interference immunity. Impulse
duration >100 ms.
Please use cores twisted in pairs (for
example clock+ / clock-) for extensi-
on cables of more than 10 m length.
8
1
9
10
12
2
3
7
6
11
4
5
DATAVALID
Diagnostic output.
An error warning is given at level Low.
Important: Interferences must be filtered by
the downstram electronics.
Trigger level
SSI
Circuit
DATAVALID MT Diagnostic output for monitoring the
multiturn sensor voltage supply. Upon
SSI-Clock
SSI-Data
Optocoupler
Linedriver RS485
dropping below a defined voltage level the
DV MT output is switched to Low.
UP/DOWN
UP/DOWN counting direction input.
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.
Control inputs
Input level High
Input level Low
Input resistance
Input circuit
>0.7 UB
<0.3 UB
10 kΩ
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