Burkert Type 8681 - Manual (Page 48)

48
DeviceNet - Design
Inputs 3 discrete feedback signal of the position measuring system (positions S1 - S3)
1 discrete feedback signal of the external initiator (S4)
1 analog position signal in mm
supply via DeviceNet string (11 to 25 V DC)
Switch level high signal ≥ 5 V
Switch level low signal ≤ 1.5 V
Outputs 3 solenoid valves
Power consumption
from the bus:
max. output 5 W, if all valves are switched (3 x type 6524 with 0.8 W each)
Total line length and maximum line length according to 12.3.1.
devicenet specification
The bus line is a 4-core cable with additional shielding which must conform to the DeviceNet specification. The cable
transmits both information (data) and energy (power supply for low-power actuators and sensors).
The maximum total line length (sum of trunk lines and drop lines) of a network depends on the baud rate.
Baud rate
Maximum total line length* 1
thick cable* 2 thin cable* 2
125 kbaud 500 m
100 m for all baud rates 250 kbaud 250 m
500 kbaud 100 m
* 1 A ccording to DeviceNet specification. If a different cable type is used, lower maximum values apply.
* 2 For cable designation and details refer to DeviceNet specification
drop line length 12.3.2.
Baud rate
length of the drop lines
Maximum length
Maximum total length of all drop lines in the
network
125 kbaud
6 m for all baud rates
156 m
250 kbaud 78 m
500 kbaud 39 m
english
Control Head Type 8681