Burkert Type 8644 - Manual (Page 35)

8644/phoenix - 31
S
YSTEM
D
ESCRIPTION
Connection technique Tension spring terminals
Recommended cable lengths max. 30 m;
cable routing over free areas not permissible
Forwarding Via potential shunting
Behaviour on voltage drop and The voltages forwarded from the bus
interruption terminal to the potential shunters (main and segment
voltage) follow the appliedsupply voltages without delay.
Rated voltage 24 V DC
Tolerance - 15 % / + 20 % (to EN 61131-2)
Ripple ± 5 %
Permissible range 19.2 V to 30 V
Current loading Max. 8 A
Technical data of the field bus module Profibus DP bus node
ATTENTION!
Protect 24 V section externally!
This 24 V section must be protected externally with a fuse. The power supply unit must be
capable of supplying 4 times the rated current, so that in case of a fault, blowing of the
fuse is assured.
Minimize heat generation!
For supplying the main voltage and for supplying or tapping the segment voltage, use both
adjacent contacts.
Observe current carrying capacity!
The maximum cumulative current through the potential shunter is 8 A.
Min. current consumption at rated voltage 0.10 A DC
main power supply (at open circuit, i.e. incoming remote bus attached, no local
bus participants connected, bus inactive)
Max. current consumption at rated voltage 1.25 A DC
main power supply consisting of: 0.75 A DC for logic supply
0.5 A DC for analog voltage supply
Protective features
Overvoltage yes
False polarity yes