G1M2H Datasheet, PDF (3/4 Pages) Baumer IVO GmbH & Co. KG – Absolute encoders - SSI

Absolute encoders - SSI
Hollow shaft max. ø50.8 mm
Optical multiturn encoder 13 bit ST / 12 bit MT
G1M2H, G2M2H - SSI
Terminal significance
UB
Encoder voltage supply.
GND
Encoder ground connection relating to UB.
Data+
Positive, serial data output of differential
linedriver.
Data-
Negative, serial data output of differential
linedriver.
Clock+
Positive SSI clock input.
Clock+ together with clock- forms a current
loop. A current of approx. 7 mA towards
clock+ input means logic 1 in positive logic.
Clock-
Negative SSI clock input.
Clock- together with clock+ forms a current
loop. A current of approx. 7 mA towards
clock- input means logic 0 in positive logic.
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.
DATAVALID
Diagnostic output.
An error warning is given at level Low.
Important: Interferences must be filtered by
the downstram electronics.
DATAVALID MT Diagnostic output for monitoring the
multiturn sensor voltage supply. Upon
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.
Terminal assignment
Connector Core colour Assignment
Pin 1
brown
UB
Pin 2
black
GND
Pin 3
blue
Clock+
Pin 4
beige
Data+
Pin 5
green
Zero setting
Pin 6
yellow
Data-
Pin 7
violet
Clock-
Pin 8
brown/yellow DATAVALID
Pin 9
pink
UP/DOWN
Pin 10
black/yellow DATAVALID MT
Pin 11
–
–
Pin 12
–
–
8 91
7 ^{12 10} 2
6
3
5 ¹¹ 4
Please use cores twisted in pairs (for
example clock+ / clock-) for extensi-
on cables of more than 10 m length.
Trigger level
SSI
SSI-Clock
SSI-Data
Control inputs
Input level High
Input level Low
Input resistance
Circuit
Optocoupler
Linedriver RS485
Input circuit
>0.7 UB
<0.3 UB
10 kΩ
3
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