RS422, Synchronization
Note
: The DS900 series sensor supports Power over Ethernet. If the sensor is connected to a network
adapter/switch that is capable of PoE and if you also use the power supply of the multifunction port, these two
power supplies have to be galvanically isolated.
l
For the multifunction socket and the pin assignment, see
Multifunction Port
on page 23
.
l
The DS900 series sensor has an RS422 port according to EIA standards, which can be parameterized as input or
output via software.
l
The RS422 port can be used to synchronize line-triggering of multiple sensors with each other.
l
The internal terminating resistor (termination R
T
= 120 Ohm, see the following diagram) can be activated or
switched off via software. The signals must be operated symmetrically according to the RS422 standard.
l
The RS422 port is galvanically isolated from GND and Laser on/off, but not from GND-In1 ... 3. When used, one of
the GND-In1 ... 3 should be connected to the GND of the remote station in order to avoid potential differences.
The multifunction socket can be used with either of the following configurations:
Configuration
Direction
Standard setting for terminating resistor
R
T
0
Half-duplex, serial communication with 115200
Baud
input/output
On
1
Half-duplex, serial communication with 57600
Baud
input/output
2
Half-duplex, serial communication with 38400
Baud
input/output
3
Half-duplex, serial communication with 19200
Baud
input/output
4
Half-duplex, serial communication with 9600
Baud
input/output
5
Line trigger input
input
On
6
Line trigger output
output
Off
7
CMM trigger output
output
Off
Synchronizing several sensors with each other:
1. Connect the output RS422+ (Pin 12) of sensor 1 with the input RS422+ (Pin 12) of sensor 2.
2. Connect the output RS422- (Pin 11) of sensor 1 with the input RS422- (Pin 11) of sensor 2.
3. Also connect both the GND-In1 - pins (Pin 4) of the sensors to each other.
Software settings:
Setting
Sensor 1
Sensor 2
Sensor 3
RS422 mode
Line trigger output
Line trigger input
Line trigger input
No RS422
termination
No (terminating resistor not
active)
Yes (terminating resistor not
active)
No (terminating resistor
active)
Sensor 1 then synchronizes the sensor 2 and further sensors as master.
27
RS422, Synchronization
Summary of Contents for DS900 Series
Page 1: ...DS900 Series Displacement Sensors Reference 02 21 2018 Version 9 3 0 5...
Page 14: ...Dimensions DS910B 14 Dimensions DS910B...
Page 17: ...Dimensions DS925B 17 Dimensions DS925B...
Page 18: ...18 Dimensions DS925B...
Page 28: ...28 RS422 Synchronization...
Page 31: ...31 Measuring Field Selection...
Page 42: ...January 2018...
