Burkert 8681, Руководство по эксплуатации

Страница: 55 / 166

55
AS Interface - Design
Model Calculated line length (including internal cabling)
Multi-pole, outer cable length approx. 15 cm 0.3 m
Multi-pole, outer cable length approx. 80 cm 1.0 m
Table 1: Calculated line length of the control head versions (cable length inside and outside)
Example calculation line length:
for multi-pole connection with approx. 15 cm outer cable length :
When using 62 control heads, the AS interface cable harness may still be (100 m - 62 * 0.3 m) = 81.4 m
long.
If the calculated maximum line length of 100 m were to be exceeded, a commercially available AS interface
repeater may be used, as needed.
Observe maximum power supply via certified AS interface power supply units ≤ 8 A!
For details see AS interface specification.
Observe the optional design "AS Interface with External Power Supply" to reduce the load on the AS
interface bus segment! (see chapters “12.5” and “12.8”)
Use cables according to the AS interface specification.
If other cables are used, the maximum cable length will change.
12.5 Electrical data
Comments / notes:
Outputs (from master perspective): 0 to 3 solenoid valves
Inputs (from master perspective): 3 binary feedback signals and 1 external initiator
Watchdog: If bus communication fails for more than 50 to 100 ms, the
outputs are set to 0
Setting the solenoid valves' power supply using jumpers on the AS interface electronic module:
Power supply via AS interface External power supply
(connection see chapter “12.8”)
Jumper
Jumper
Fig. 22: Jumper settings for power supply via AS interface or for external power supply
The control head Type 8681 was developed according to the Complete Specification (V.3.0) and the Profile
S-7.A.E and S-7.F.F of the AS International Association.
english
Control Head Type 8681