GXM7W-RS485 Datasheet, PDF (3/4 Pages) Baumer IVO GmbH & Co. KG – Absolute encoders - bus interfaces

Absolute encoders - bus interfaces
Shaft with clamping or synchro flange
Optical multiturn encoders 13 bit ST / 12 bit MT, RS485
GXM7W - RS485
Terminal significance
UB
GND
T,R IN
T,R OUT
Zero setting
UP/DOWN
Ident 1...2
Encoder voltage supply.
Encoder ground connection relating to UB.
Serial data lines.
To avoid stub lines the data lines are
guided outside on a pair of 2 wires. The
arriving bus is on T,R+ IN and T,R- IN, the
departing bus on T,R+ OUT und T,R-. If the
encoder serves as bus termination or is
the only user, only the pair of wires T,R+ IN
and T,R- IN is utilized. Note: External
connection of terminating resistor 150 Ω
to final user.
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.
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.
Ident 1...2 are utilized for setting the en
coder addresses (identifiers). Less poten
tial the inputs are internally against UB
(=“1“) by pull-up resistors what equals
address 2.
Address
Ident 1
Ident 2
2345
1010
1100
Terminal assignment
Connector Core colour Assingment
Pin 1
brown
UB
Pin 2
black
GND
Pin 3
blue
T,R+ IN
Pin 4
beige
Ident 1
Pin 5
green
T,R- OUT
Pin 6
yellow
Ident 2
Pin 7
violet
T,R- IN
Pin 8
brown/yellow UP/DOWN
Pin 9
pink
T,R+ OUT
Pin 10
black/yellow Zero setting
Pin 11
–
–
Pin 12
–
–
8 91
7 ^{12 10} 2
6
3
5 ¹¹ 4
Please use cores twisted in pairs (for
example T,R+ / T,R-) for extension
cables of more than 10 m length.
Trigger level
Interface
Data
Control inputs
Input level High
Input level Low
Input resistance
Circuit
Linedriver RS485
Input circuit
>0.7 UB
<0.3 UB
10 kΩ
3
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