2
Note: to prevent overheating of the cabinet and
inserted modules, provide air circulation
room at
the
cabinet front and rear (10 cm) and bottom (1
cm).
3. The chassis should be connected to safety ground
utilising the connection on the side wall of the
cabinet (1 in figure 1a).
4. Fasten the power cord to the strain relief stud
(see the hexagons in figures 1a and c, top).
5. Connect the power cord to the power supply and
switch on power. The electric fans should be
working; if not, disconnect power immediately
and check the power voltage.
6. Power off the cabinet and install the Siqura
modules according to the instructions given in the
user manuals of the modules. Slots not in use
should be covered
with
7TE
blanking plates (BF
07).
7. Power on the cabinet. Both fans should be
working, blowing outwards.
4. Care, maintenance and safety
For reliable operation of the module, observe the
following:
- prevent dust from collecting on the equipment
- protect the equipment against moisture
- maintain sufficient cooling space around the
equipment (see §3).
- replace the electric fans every 5 years. Consult
section 7 on how to replace fans.
- replace blown fuses only with the types specified.
Consult section 8 on how to change fuses.
For ultimate safety, one should not remove, add or
exchange modules while the power supply cabinet
is operating. If a module causes a DC short on the
secondary (output) side, the MC 11 will turn itself
off; it can be restarted by taking power off for at
least 4 seconds, then connecting it again.
5.
Configuring the cabinet
5.1.
General
There are two basic operating modes: SNM (also
loosely called EB-2) and EB (the latter providing
compatibility with the older EB protocol; for EB
configuration see §5.3). Dip switches are used to set
modes and parameters, which are not identical for
the two modes. The dip switches for setting the
parameters of MC 11 EB-2 cabinets are located on
the board inside the module in the dedicated slot 0
(the EB-2 board: see figures 1a and 2).
If the cabinet is already installed and filled with
modules, these switches may be accessed - after
powering off - by removing the modules from the
first three or four adjoining slots.
The position of switch no. 8 determines whether the
module is in EB-2 or in EB mode (see table 2).
5.2.
SNM (EB-2) mode
In SNM (EB-2) mode, the RS-485 transmission
speed is fixed at 19.2 kbaud.
The address (1-31) of the EB-2 module must be set
if this module is to use EB-2 local addressing mode.
These address switch settings are listed in table 3.
Switch
Set(s)
1-5
EB-2 address if set to local addressing using
dip switches (see table 5)
6&7
off-off: EB-2 absolute addressing
6&7
on-off: EB-2 local (manual) addressing
8
compatibility mode: must be 0 (off) for EB-2
Table 2. Dip switch assignments in EB-2 mode.
Switch
1
2
3
4
5
Address
-
-
-
-
-
Reserved
default
on
-
-
-
-
01
-
on
-
-
-
02
on
on
-
-
-
03
-
-
on
-
-
04
on
-
on
-
-
05
-
on
on
-
-
06
on
on
on
-
-
07
-
-
-
on
-
08
on
-
-
on
-
09
-
on
-
on
-
10
on
on
-
on
-
11
-
-
on
on
-
12
on
-
on
on
-
13
-
on
on
on
-
14
on
on
on
on
-
15
-
-
-
-
on
16
on
-
-
-
on
17
-
on
-
-
on
18
on
on
-
-
on
19
-
-
on
-
on
20
on
-
on
-
on
21
-
on
on
-
on
22
on
on
on
-
on
23
-
-
-
on
on
24
on
-
-
on
on
25
-
on
-
on
on
26
on
on
-
on
on
27
-
-
on
on
on
28
on
-
on
on
on
29
-
on
on
on
on
30
on
on
on
on
on
31
Table 3. Setting the communication address of an MC 11
RS-485
interface in EB-2 local addressing
mode or in EB mode
. - = off.
Figure 2. Dip switches on the EB-2 controller
board (details left out for clarity)
1 2 3 4 5
7
6
8
ON
DIP SWITCH BANK
ON
