ZWR2MSKU 1P - Elcon Systemtechnik

Supply concept
The ZWR2MSKU can be either locally powered or operated with remote power
supply (LT2M-side or NT2M-side). If local supply voltage is provided, then the
ZWR2MSKU makes use of it even under the condition remote power supply would
be additionally applied. Local feeding always has priority over remote power supply.
LT2MSKU ZWR2MSKU
local power supply
Fig. 3: ZWR2MSKU with local power supply
NT2MSKU-E
or
NT2MSKU-T
The ZWR2MSKU is powered by the line terminating unit with 112 VDC (+ 3 VDC) via
the twin wire. It shall be taken into consideration that the remote power supply can be
only effected either from the LT2M side or the NT2M side. Default configuration upon
delivery is LT2M-side remote feeding of the ZWR2MSKU.
LT2MSKU ZWR2MSKU1
Remote power supply for the LT2M-side
ZWR2MSKU 1 via line terminating unit
LT2MSKU
Fig. 4: Two cascaded ZWR2MSKU with related remote power supply
2 Assembly and mounting instructions
General
For installing the regenerative repeater please push carefully the ZWR2MSKU into
the corresponding slot. The two pilots on the housing are used as reverse polarity
protection. The metal bracket on the front of the repeater can be used for removing
the unit from the slot.
Switch to remote power-feeding from NT2M
ZWR2MSKU 2
NT2MSKU-E
or
NT2MSKU-T
Remote power supply for the NT2M-side ZWR2MSKU 2 via
network terminating unit NT2MSKU-E or NT2MSKU-T
The ZWR2MSKU is default set to remote power feeding from the LT2MSKU unit. For
switching into NT feeding please follow the below named instruction:
ELCON Systemtechnik GmbH Page 4 of 8
Pilots
Fig. 5:
Connection side of
the ZWR2MSKU
Attachment screws
Connection cable for
changing of the remote
power supply
In direction of NT
1. Disassembling of the housing – please remove the
four screws (see figure 5) of the housing on the
connection side of the ZWR2MSKU.
2. Please remove the housing cap including the
mounted PCB’s from the housing. Please pay
attention, that the sealing rubber will not be loosed
(he is located in the notch between the housing and
the cap).
3. Please remove carefully the power cable connector
from the jack “FSP-LT” (see fig. 6)
4. Please snap the cable connector carefully into the
jack “FSP-NT”.
5. Assembling of the housing – please push the housing
cap including the two PCB’s and the aluminium foil
into the housing. Please pay attention for the
mounting direction – the LED’s must meet the light
conductors in the housing. Furthermore please take
care, that the connection cables will not be jammed.
6. Please close the housing by tighten the 4 screws.
In direction of LT
Sealing rubber
Fig. 6: Change of the remote power supply direction
ELCON Systemtechnik GmbH Page 5 of 8

3 Putting into operation
General
After inserting the ZWR2MSKU into the corresponding slot the following start-up
procedure is arising.:
(Assumption: the power supply is already connected and the SHDSL transmission
path from the LT and NT is active)
1. The device is beginning with an self-test procedure in the first ca. 15 seconds.
During this time both LED’s will not shine!
2. After this the LT2MSKU is starting up the SHDSL line to the ZWR2MSKU (first
transmission path) and the red UKS-LED is blinking with a frequency of 4 Hz.
3. After successful set-up of the first transmission path, the red UKS-LED is
blinking with 1 Hz frequency. During this time the second transmission path
between the ZWR2MSKU and the NT2MSKU will be built-up.
4. If the red UKS-LED is switched off finally, than the complete transmission path
is established.
The ZWR2MSKU is controlled by the LT2MSKU and can be managed by the Elcon
Network Management System (ENMS).
Special characteristic during the SHDSL Start-up
Please take into account, that the restart time of an aborted SHDSL line could reach
ca. 1 minute by using one ZWR2MSKU and up to 4 minutes by using two repeaters
in the SHDSL transmission path (the given time targets are defined by the ITU-/ ETSI
standards ITU-T G.991.2 and ETSI TS 101 524)
5 Interfaces
Pin assignment of the ZWR2MSKU
1 2
Pin connector 1:
2, 3 SHDSL connection in LT direction
7 FPE
11, 12 Local supply voltage ranging from
20 VDC ... 75 VDC
11: Negative potential
12: Positive potential
Pin connector 2:
7 FPE
11, 12 SHDSL link in NT direction
ELCON Systemtechnik GmbH Page 6 of 8
1 Description of regenerative repeater ZWR2MSKU
General
The regenerative repeater ZWR2MSKU is used if the line length between line
terminating unit LT2MSKU and network terminating unit NT2MSKU-E or NT2MSKU-T
exceeds the maximum operating range of the UKS interface.
When using one ZWR2MSKU the range is doubled, whereas application of two
cascaded ZWR2MSKU allows to quadruple the transmission range of the SHDSL
system.
The regenerative repeater for SHDSL transmission ZWR2MSKU with 1 UKS
interface regenerates the attenuated and distorted signal of incoming pulse
sequences and forwards it further. The line digit rate is 2320 kbps.
The repeater is accommodated in an ABS plastic cassette (protected as per IP 52/54),
and can be installed either in a cable fitting or in a repeater rack ZWRE which is
designed for installation into cable junction boxes (KVz).
The ZWR2MSKU requires 1 slot in the ZWR subrack or in a cable fitting.
The figures below show the basic structure of an SHDSL system including 1
repeater, respectively, two cascaded repeaters.
1. path (1. DA)
(LT2M-side
LT2MSKU ZWR2MSKU
1. path (1. DA)
(NT2M-side
NT2MSKU-E
or
NT2MSKU-T
Fig. 1: Structure of a 1DA-SHDSL system with one repeater ZWR2MSKU
1. path (1.DA)
(LT2M-side)
LT2MSKU ZWR2MSKU1
1. path (1.DA)
ZWR2MSKU 2
Fig. 2: Structure of a 1DA-SHDSL system
with two cascaded regenerative repeaters
1. path (1.DA)
(NT2M-side)
NT2MSKU-E
or
NT2MSKU-T
ELCON Systemtechnik GmbH Page 3 of 8

Contents
1 Description of regenerative repeater ZWR2MSKU.............................................. 3
2 Supply concept.................................................................................................... 4
3 Assembly and mounting instructions ................................................................... 4
4 Putting into operation .......................................................................................... 6
5 Interfaces............................................................................................................. 6
6 Indicating elements ............................................................................................. 7
7 Technical data (in extracts) ................................................................................. 7
8 Safety precautions............................................................................................... 8
ELCON Systemtechnik GmbH Page 2 of 8
6 Indicating elements
Fig. 6: Front side of the ZWR2MSKU
Meaning EIN UKS
Remote or local power applied ON
No power supply OFF
First path section is being established 4 Hz
Second path section is being established 1 Hz
Line set-up has been completed OFF
Table 1: Meaning of LED displays
Explanation of symbols:
ON LED shines permanently
OFF LED does not shine
1 Hz LED flashes at 1 Hz
4Hz LED flashes at 4 Hz
7 Technical data (in extracts)
Local power feeding 20 – 75 VDC
Remote power feeding 112 VDC + 3 V
Power consumption by local power < 4W
Feeding range max. 3300 m (at 0.4 mm PE cable)
ELCON Systemtechnik GmbH Page 7 of 8

8 Safety precautions
Keep this instruction at a safe place!
Please adhere to the following safety precautions. Read them through carefully
before putting the device into operation.
ESD protection
Upon opening and during installation of components of the HDSL transmission
system, please take the protective measures as per IEC 61340-5-1.
Precautionary measures in case of thunderstorms
Do not work on the SHDSL transmission system and its components during thunderstorms
(Plugging and unplugging of sub-units and cables should be avoided; Do not
connect the SNG2M to the network terminating unit / line terminating unit).
Telecommunication installations with remote power supply
Upon working on the SHDSL transmission system, its components and cables,
please observe the provisions specified in DIN 57800, part 3 (VDE 0800, part 3).
Only qualified staff is allowed to carry out the respective works!
Earthing and potential equalization
During installation, operation and maintenance of the SHDSL transmission system
pay attention to the IEC 60364-5-54. The earth contact of the SNG2M (FPE,
green/yellow conductor) has to be always connected with the network terminating
unit / line terminating unit.
Warning of dangerous electrical voltage
The SHDSL transmission system has interfaces with dangerous electric voltage. All
works on the system shall be carried out only by qualified personnel.
Warning of dangerous laser radiation - laser of class 1
Never look directly or indirectly (e.g. via a mirror) into the laser beam, i.e. to the end
of the fibre cable or the respective connector. To avoid any unintentional look into the
laser beam, open cable ends or connectors shall be principally sealed with a dust
cover.
To maintain the superior transmission properties of optical fibre cable, it must not be
bent. To avoid bending of the glass-fibre cable, it shall be inserted into the provided
take-up unit (→ fig. 58). The radius for reversing shall be no less than 60 mm (e.g.
the smallest admissible bending radius is 30 mm). For this, see also the TS
0011/02.96 (switching cable for telecommunication cable; fibre switching cable of
type SVH with monomode fibre). Further, open cable ends and connectors shall be
provided with a dust cover, to prevent pollution which would lead to additional
attenuation. Therefore do not touch to the fibre end faces. For cleaning of the glassfibre
connectors (if necessary), please use the specially provided cleaning pads and
materials. Do never use compressed air or the air you breathe to blow away any
impurities.
ELCON Systemtechnik GmbH Page 8 of 8
2 Mbps SHDSL regenerative repeater for
1-pair copper-wires
ZWR2MSKU 1P
Assembly Instruction
Order-Number: 101 413