MC 10 AC /EB-2

MC 10 AC /EB-2
Redundant power supply cabinet with external bus
USER/MAINTENANCE MANUAL
1
SLOT 0
1
SLOT 1
SLOT 2
SLOT 3
SLOT 4
SLOT 5
SLOT 6
SLOT 7
SLOT 8
SLOT 9
SLOT 10
SLOT 11
PS2
EB-2
(a)
(b)
(c)
Figures 1a, b and c. Module mounting (a) and fan sides (b) of MC 10 AC EB-2 cabinet, and (c) slot 0 panel.
1. General description
PLEASE REFER TO SECTION 12 FOR SAFETY AND
EMC RELATED ITEMS FIRST
The MC 10 AC EB-2 19" redundant power supply
cabinet with external bus has 10 free slots for NKF
plug-in modules (7TE), supplying these with the
correct DC voltages and management data. The
'mains' power connector module in the dedicated
slot 0 contains a microprocessor, used for:
- monitoring and reporting the status of SNM
compatible modules in the cabinet, as well as
controlling those from the SmartMux series;
- controlling two relays;
- reading status information of the cabinet proper,
such as voltages.
Two RS-485 serial bus interfaces to the processor
are provided, allowing remote system management
and control. By way of these interfaces, a large
number of MC XX EB-2 cabinets may be linked
with 4-wire data cable, e.g. two twisted-pair cables.
More information on system control can be found
in supplementary manuals; the cabinet can be made
to be compatible with the older EB protocol.
Slot 11 contains a second mains module.
The MC 10 cabinet contains two independent
power supplies operating in redundant fashion: if
the one being active fails to meet its specifications e.g. as a result of a power problem - the other will
take over automatically.
The MC 10 AC EB-2 internals are cooled with two
protruding fans. Cabinet power is taken from AC
sources. Note that the cabinet mounting brackets
can be put on the module side or on the fan side
(see figures 1a, b).
2. Indicators and connectors
In figure 1a, SLOT 0-SLOT 11 indicate the twelve
module slots. External earthing points (1) are
provided on both shorter cabinet sides.
The front panel of the controller module has two 9pin
D-connectors
for
serial
(external)
communications, and two 2-pin relay connections 1
and 2 combined into one connector (see figures 1a,c
and table 1).
This panel also provides a mains connector and an
access panel for the mains fuse (figures 1a,c and 4),
as does the rightmost panel.
(three-prong connector, 2x)
(fuse)
↔ (4-p Combicon)
CC o
↔, 9-pin fem. DDATA o
connector, 2x
mains connector
power fuse holder
relay contacts 1, 2
RS-485 serial interfaces
Status LEDs on EB-2 card
*DC (green)
DC power good
*EB (green)
control data I/O
relay 1 activated
*1
relay 2 activated
*2
Square status LEDs on fan side
*DC (green) (2x)
mains power good
Table 1. Panel layout of module S0. Note: the relay
contacts are open when the MC 10 EB-2 is not powered.
3. Installation instructions for EB-2 mode
1. Choose the mode of operation (SNM absolute
addressing, SNM local addressing, or EB
compatibility mode) and other operating parameter
values, cf. §5, tables 2-5).
2. Mount the MC 10 AC EB-2 cabinet into a
standard 19 inch rack, without modules in the slots.
Check whether the specified power voltage of the
cabinet matches that of the local power supply.
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
utilizing the connections on the side walls of the
cabinet (1 in figure 1a).
4. Fasten the power cords to the strain relief studs
(see the hexagons in figure 1a, c).
5. Connect the power cords to the power supplies to
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 NKF modules
according to the instructions given in the user
manuals of the modules. Unused slots should be
covered with 7TE blanking plates (BF 07).
7. Power the cabinet. Both fans should be working,
blowing outwards.
ON
ON
1 2 3 4 5 6 7 8
DIP SWITCH BANK
Figure 2. Dip switches on the EB-2 controller
board (details left out for clarity)
Switch no. 8 selects SNM or EB mode (see table 2).
Set(s)
1-5 EB-2 address if local addressing is used (tbl. 3)
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
5.2. SNM mode
In SNM mode, the RS-485 ports use 19.2 kbit/s.
The address (1-31) of the EB-2 module must be set
if this module is to use SNM local addressing.
These address switch settings are listed in table 3.
4. Care, maintenance and safety
Switch
In order to maintain reliable operation of the
module, please observe the following:
- prevent dust from collecting on the equipment
- protect the equipment against moisture
- maintain sufficient free space around the
equipment for cooling
- replace the electric fans every 5 years. Consult
section 7 on how to replace fans.
- replace blown fuses only with the types specified.
Please consult section 9 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 10 will turn itself
off; it can be restarted by taking power off for at
least 4 seconds, then connecting it again.
default
5. Configuring the cabinet
5.1. General
There are two basic operating modes: SNM (also
loosely called EB-2) and EB compatibility (§5.3).
Dip switches are used to set modes and parameters,
which are not identical for the two modes. The
switches for setting the parameters of MC 10 AC
EB-2 cabinets are located on the board inside the
module in the dedicated slot 0 (see figures 1a, 2).
These switches may be accessed - after powering
off completely - by removing the modules from the
first few adjoining slots to the right of the zero slot.
1
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
2
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
3
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
4
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
5
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
Address
Reserved
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Table 3. Setting the communication address of an MC 10
RS-485 interface in EB-2 local addressing
mode or in EB compatibility mode. (- = off)
2
5.3. Configuration for EB mode
In EB (= EB-1) compatibility mode, switches 1-5
set the cabinet address, while switches 6 and 7
control the transmission rate (see tables 3-5).
Switch
1-5
6-7
8
Set(s)
5-bit address of cabinet in EB mode
baud rate (see table 5)
always 1 (on) for EB mode
Table 4. Switch assignments in EB mode
Switch
6
7
Transmission rate (baud)
on
on
on
on
2400
4800
9600
19.2 k
Table 5. Setting the transmission rate of the
RS-485 interface in EB mode.
Figure 3. Replacing an electric fan. Please note
that connector (2) is fastened with two screws.
5.4. Cabinet programming
For more information on EB mode, please consult
the ‘MC EB Users Manual for Remote Control'.
SNM/EB-2 programming is taught in the SNM/EB-2
Programming Manual.
8. Replacing and checking the primary fuses
1. Power down the PS1 or PS2 unit
disconnecting it from the power supply.
by
6. D-connector pin assignments
The pin assignments of the 9-pin D-connectors are
given in table 6 below.
Pin
1
2
3
Description
not connected
Btx' inverting output → (- out)
A tx' non-inverting output → (+
out)
4 Brx' inverting input ← (- in)
5 Arx' non-inverting input ← (+ in)
6 not connected
7 not connected
8 not connected
9 not connected
Table 6. Pin assignment of the 9-pin D connectors
o
o
o
1
o
1
Figure 4. Replacing a fuse of the MC 10 AC EB-2
2. The primary fuses (1 in figure 4) are located right
7. Replacing the electric fans
(Qualified service personnel only)
Figure 4. Replacing a fuse of the MC 10 AC EB-2
The two electric fans must be changed every five
years; replacements may be obtained from
Optelecom-NKF. The procedure for mounting a
new fan is as follows (see also figure 3):
1. Power down the MC 10 EB-2 cabinet and wait
for >3 minutes.
2. Disconnect a fan by taking off its green external
connector, then remove the mounted fan from
the black cover (see figure 3).
3. Replace removed fans with new ones, making
certain the blowing direction is outwards.
4. Reconnect the power supply leads for the fans.
5. Reconnect the power cabinet to the mains. The
fan should be running and blowing outwards.
under the mains sockets. Table 7 lists fuse data.
Power voltage
fuse value
type
250 V/1.6 A, time-lag glass, 5x20 mm
230 VAC
250 V/3.15 A, time-lag glass, 5x20 mm
115 VAC
Table 7. Replacement fuses
3. Reconnect power to activate the unit.
3
9. Replacing a power supply (Qualified service personnel only)
6
2
FAN 1
FAN 2
3
SEC
PRI
+_
LED
MC 10-11 power supply
NK
4
1
PWR OK
5
Figure 5. MC 10 power supply board (PS2) on back plate (removed from cabinet and laid down flat on its back panel).
Power supply boards are identical, but mounted rotated 180o.
Connectors are:
1. AC power & earthing
4. DC power good LED [6]
2. Fan connectors (see text)
5. Power sensing connection to EB-2 card
3. DC power out
All connectors are keyed.
- disconnect the large Molex connector (3) holding
the DC wires going to the backplane;
- disconnect the two small connectors of the EB-2
monitoring lead (5) and the LED power supply
lead (4);
- disconnect the green power supply wire connector
(1) and the earthing lead.
The order of these steps may be reversed,
depending on the way the cabinet is standing on a
table during repair.
Before any of the two independent power supply
circuit boards inside an MC 10 cabinet is replaced,
the cabinet should be switched off completely by
taking out the power cords, in strict accordance
with safety regulations.
Replacement boards can be obtained from
Optelecom-NKF.
The procedure is described here for the rightmost
power board viewed from the fan side. Please note
that both power supply boards are identical, but are
mounted rotated 180o about an axis perpendicular to
the boards.
Remove the circuit board and replace it by a new
one. Please check the assembly carefully: the two
screws positioned asymmetrically on the longer
sides of the circuit board may serve as checkpoints.
After powering down and waiting for at least 3
minutes, remove the cover plate of the board to be
replaced; the power board is mounted on this panel.
Connect the indicator leads and then the power
leads. For the fan connection on the board, use the
connector marked FAN 2. Please ascertain that the
two identical connectors of the mains power LED
on the fan plate and the EB-2 mains power sensing
are connected correctly.
Finally, reinstall the power supply/cover assembly,
and provide the cabinet with power.
The power supply boards can be disconnected and
removed as follows:
from the power supply circuit board:
- if the fan lead is connected to the power supply
board, disconnect it; else pull its connector from
the backplane after the other leads have been
disconnected from the board;
4
10. Technical specifications
12. Safety and EMC information
The equipment described in this manual has been designed and
tested according to the IEC 60950-1 safety requirements. It is an
IEC safety class 1 product; the ground wire in the line cord must
be connected when operating.
Electrical
...Power:
AC voltage nominal
220 ... 240
VAC
AC voltage operational
195 ... 264
VAC
Optional AC voltage nominal
120
VAC
Optional AC voltage oper.
102 ...132
VAC
Frequency
40 ... 100
Hz
Maximum drop-out time
20
ms
Secondary maximum load, continuous
+15 V ± 5% max. current
7.0
A
2.0
A
−15 V ± 5% max. current
+15 V ± 5% operational
5.5
A
2.0
A
−15 V ± 5% operational
AC input current
1.0
A
AC input current 120 V model
2.0
A
%
Power efficiency (η, full load)
> 82
Max. output power (see fig. 6)
105
W
Max. output power up to 74°C
83
W
Primary fuses
fuse type
5 x 20 (glass)
mm
250 V/1.6 A, time-lag
230 VAC version
250 V/3.15 A time-lag
120 VAC version
The equipment has been tested and found to meet the EGregulations relating to EMC, and complies with the limits for a
Class B device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against interference
to radio communications in any installation. The equipment does
use radio frequency energy; improper use or special circumstances
may cause interference to other equipment or a performance
decrease due to interference radiated by other equipment. In such
a case, the user will have to take appropriate measures to reduce
such interactions between this and other equipment.
The equipment described in this manual is designed for use by
properly trained personnel. This means that adjustment,
maintenance and repair of the equipment should only be carried
out by qualified personnel aware of the hazards involved. For
correct and safe use of the equipment and in order to keep the
equipment in a safe condition, it is essential that both operating
and servicing personnel follow standard safety procedures in
addition to the safety precautions and warnings specified in this
manual.
...Relays 1 and 2
Switching current
Switching voltage (AC/DC)
"on" resistance
≤ 100
≤ 100
≤ 100
RS-485 interfacing
Data rate (sel.): EB
EB-2
Protocol
If there is any doubt regarding the safety of the equipment, do
not put it into operation.
This might be the case when the equipment shows physical
damage or is stressed beyond its tolerable limits (e.g. during
storage and transportation).
mA
V
Ω
2.4 (4.8, 9.6, 19.2) kb/s
19.2
EB-1 or SNM(EB-2) protocol(1)
Before opening the equipment, disconnect it from all power
sources. After disconnection from its power sources, the
capacitors in the equipment may remain charged for some
(typically 3) minutes.
When removing covers or other parts of the equipment, live parts
or terminals may be exposed. If the opened, live equipment needs
calibration, maintenance or repair, only trained personnel, who
are aware of the risks, may perform this.
Environmental & safety
Temperature range
Full load (10 slots x 9W)
Operational (max. 83W)
Relative humidity (no cond.)
Electrical safety
UL Listed I.T.E.
Surge protection AC mains
EMC emission
EMC immunity
ESD
o
C
-40 ... 65
o
C
-40 ... 74
%
≤ 95
IEC 60950-1
E 242498
2 kV (IEC 61000-4-5)
IEC 61000-6-3
EN 55022 Class B
FCC pt. 15 Clas B
IEC 61000-6-2, EN 50130-4
6 kV contact, 8 kV air
(IEC 61000-4-2)
Any interruption of the ground wire inside or outside the
equipment, or disconnection of the protective earth terminal,
could make the equipment dangerous.
Before any connections are made, the equipment must be
connected to safety ground.
Electrostatic discharge (ESD) can damage or destroy electronic
components. Proper precautions should be taken against ESD
when opening the equipment.
Mechanical
Housing
3 HE, 19" (84TE), 24 cm
AC connector type
IEC 60320, male
RS-485 connectors
9-p sub-D socket
Weight (approx.)
4.5
kg
Max. number of modules
10
(1)
see Supplementary user manuals for remote control (EB) and
SNM/EB-2 programming guide
MC10-11 Power supply - Output Power Derating
110
100
Total output power [W]
90
Table 8. Technical specifications of the MC 10 AC EB-2
11. Product disposal
80
70
Total output power
+15V and -15V load
combined
60
50
40
30
20
Recycling
This product contains valuable materials which
qualify for recycling. In the interest of protecting
the natural environment, properly recycling the
product at the end of its service life is imperative.
10
0
-40
-20
-10
0
10
20
30
40
50
60
70
Ambient Temperature [°C]
Figure 6. Power loading of the power supply cabinet
10 slots loaded with 9W modules: Max. ambient 65°C
10 slots loaded with 6W modules: Max. ambient 74°C
Accessories:
MC 10 AC EB-2: - power cord (2x)
- mounting & double earthing kit
- 4-pin Combicon connector
© Optelecom-NKF 2007
Version 041209-3c
MC10AC/EB-2-cert2007(MW03SP-2)
-30
5
80