Version 10.6.3
14
Marine automatic telephone system
ITS-1004
5 CONNECTION
5.1
General instructions
Connect SC to CU according to the diagrams represented in Appendix A.
To perform basic functions, the System shall consist of the central unit and user
terminals and be connected to power supply mains.
The central unit operates with AC network, frequency 50(60) Hz and voltage 220
V and (or) 24 V DC. If power backup is required, the CU is connected to standby power
24 V DC. In case of power failure the System automatically switches over to standby
power; as soon as main power restores, the System automatically switches back ensuring
uninterruptible operation.
All UTs (connected to CU) are powered directly from the CU, except PT-ADC,
PT-ADCW, 5842/1 (Ex), 5842/2 (Ex) which require additional external power supply
from AC mains, frequency 50 (60) Hz and voltage 220 V. Fax unit PT-FAX operates only
with AC mains, frequency 50 (60) Hz and voltage 220 V.
UTs are connected to CU lines using screw terminals or power outlet with standard
RJ-11 connector, see Appendix A. For more information on types of terminals which connect
CU to user terminals, external units and communication lines, see Tables А.1 – А.2.
Connect audio recorder ITS-SLSR in a user line “break” (only analog type);
connect ITS-SLSR in the line of UT which you are going to record. Number of audio
recorders shall correspond with number of UTs for recording.
ITS-SLSR
audio recorder is powered directly from user line and does not require
external power.
5.2
Recommendations on power supply
To power the System, choose a power source with corresponding power and
voltage, see Table 1.
5.3
Recommendations on cables
Table 5 – Recommended cables to connect SC
Purpose
Number of
pairs
Cable cross
section
Cable
length
Cable type
User terminals and units connected
via analog user lines (see Fig. B.1)
1 pair
0.5 mm
2
500 m
КМПВЭВ 2х0.5(э)
Power
supply
main 220 V, 50(60) Hz
1 pair
1.5 mm
2
КМПВЭВ 2х1.5(э)
main and standby
24 V DC
1 pair
At least
2.5 mm
2
КМПВЭВ 2х2.5(э)
Cable laying may be performed using trunk cables; for convenient installation use
junction boxes КР-16 designed to ensure transfer from trunk cables to single-pair cables
(user lines).
