As-I - Design; Connection Options; Maximum Length Of The Bus Line; Number Of Connectable Control Heads - Burkert 8681 Quick Start Manual

9. AS-I - DESIGN
9.1. Connection options
left connection:
1 x M16 x 1,5 cable gland with Multi-pole connection (M12 plug
acc. to IEC 61076-2-101, 4-pole) on a cable of 8 or 80 cm length
right connection:
1 x M16 x 1,5 cable gland for external initiator
9.2. Maximum Length of the Bus Line
The bus cable may be a maximum of 100 m long. When designing the
system, consider the length of the round cable leading directly to the
control head (see example calculation in the operating instructions).
9.3. Number of Connectable Control
Heads
In AS interface versions with extended addressing range
(A/B slave), 1 master can communicate with 62 slaves.
In AS interface versions with addressing range 31 slaves a maximum
of 31 control heads can be connected to a bus line (the address range
restriction).
16
english
Type 8681
AS-i-Design
9.4. Electrical Data
Power supply for the solenoid valves:
Standard: via AS-i
29,5 ... 31,6 V DC acc. specification;
21,0 ... 31,6 V DC acc. specific. Power24
Setting the solenoid valve's power supply using jumpers on the
AS-interface electronics module.
Input / proximity switches (external initiator: S4 in):
Power supply:
Current carrying capacity,
sensor power supply:
Design:
Inputs (from master
perspective):
Outputs (from master perspective) / Solenoid valves:
max. switching capacity 0.9 W (per solenoid valve)
typ. continuous output
Pull-in current:
Operating mode:
Option: externally
(19,2 V DC to
31,6 V DC)
AS interface voltage present at
control head - 10 %
max. 30 mA; short-circuit protection
DC 2- and 3-conductor, NO or NC
(factory setting NO), PNP output
3 binary feedback signals and
external initiator
0.6 W (per solenoid valve)
30 mA or 0.9 W / 200 ms
Long-term operation (100 %)