Siemens DAC-NET Installation Instructions Manual page 3

Class X Fault Status
Main
In Out
Node 1
Return
Out
Figure 4
DAC-NET D-NET Class X Fault Status
Controls and Indicators
DAC-NET
A24205-A334-B839 (Edition 14)
P/N 315-035100-14
If there is a fault in the Main loop, the node before the fault point combines
Main In with Return Out. The node after the fault point combines Return In
with Main Out. Both loops are combined and the net is still running. In this
situation there is no test data stream. After repair D-NET reconfigures
automatically. If there is a fault in the Return loop the failure of the test data
stream will be detected and notified.
Main
In Out
Node 2
Return
In Out
In Class X configuration, two unshielded twisted pairs between the nodes are
required. The connection between Node 1 and Node 32 must be in a
separate cable and must not share a conduit with any other cable.
The front panel of the DAC-NET contains one reset switch and seven LEDs
for the DAC-NET, and one D-NET address switch and four LEDs for the D-
NET. For the optionally mounted LPB, there is one reset switch and eight
LEDs as shown in Figure 1.
A reset switch is located on the top of the front panel. Pushing the reset
switch re-initializes the DAC-NET operation.
The LEDs follow the reset switch. Their functions are defined as follows:
POWER
CARD FAIL
CAN FAIL
Main
In Out
Node 31
Return
In Out
(Green) Normally ON, When illuminated, indicates
that power for the DAC-NET is applied to
the card.
When blinking twice per second, indicates
that the DAC-NET is not configured by
ZEUS Tool. When blinking fast, indicates
that the DAC-NET gets a SW Update.
(Yellow) Normally OFF. When illuminated, indicates
that the card microprocessor has failed.
(Yellow) Normally OFF. When illuminated, indicates
that the CAN communication has
terminated.
When blinking twice per second, indicates
that no CAN module is connected.
3
Main
In Out
Node 32
Return
In Out
s
In