GAI-Tronics 13310-312 지침 및 서비스 매뉴얼 - 페이지 5
{카테고리_이름} GAI-Tronics 13310-312에 대한 지침 및 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. GAI-Tronics 13310-312 6 페이지. 13310-3xx series
페이지 인쇄See Section 5 of this manual for access to the explosionproof
enclosure. The 70V Line loudspeakers are fitted with a five-
way terminal block. Terminal A is common and one of the
other terminals B, C, D or E should be selected depending
on what output level is required. (See table below.)
Terminals
A - B
A - C
A - D
A - E
For 8-ohm and 16-ohm models a single conductor with a
cross sectional area of up to 2.5mm² / ~13 AWG can be
connected to each terminal. The 70V transformer model is
supplied with two (2) sets of terminals (in and out), a single
conductor with a cross sectional area of up to 2.5mm² / ~13
AWG can be connected to each terminal. If more than one
wire is fitted into a terminal, a ferrule should be used to
secure the wires. When connecting wires to the terminals,
great care should be taken to dress the wire so that when the
cover is inserted into the chamber the wires do not exert
excess pressure on the terminal blocks.
7)
Low Impedance Wiring
-
- + +
Figure 4. Low Impedance Terminals
The 8- ohm and 16- ohm low impedance models have
dual input terminals on the PCB assembly for input and
output wiring. A cable of up to 2 .5mm² can be
connected to each terminal. If DC line monitoring is used, cut
the link on the board. (See Figure 4.)
8)
Earthing
The unit has both a primary internal and secondary
external earth fixing point.
Internal earth connections should be made to the internal
Earth terminal. See Figure 3 and Figure 4. It should be fitted
to the internal earth point using a ring crimp terminal to
secure the earth conductor.
In addition, external earth connections can be made to the
M5 earth stud (see Figure 2), using a ring crimp terminal to
secure the earth conductor to the earth stud. The external
earth crimp ring should be located between the two M5
plain washers provided and securely locked down with the
M5 spring washer and M5 nut.
The earth conductor should be at least equal in size and
__________________________________________________________________________________________________________________
GAI-Tronics 3030 Kutztown Rd. Reading PA 19605 USA
Document No. 42004-502A
Watts
25W
12.5W
6W
2W
Internal Earth
Terminal
DC Line
Monitoring Link
09-29-15
www.gai-tronics.com
Sheet 5 of 5
rating to the incoming power conductors but at least a
2
minimum of 0.82mm
/ 18 AWG in size.
9)
End-of-Line DC Monitoring
On 13310-3xx Loudspeakers, DC line monitoring can be used
if required. Both the 70V Line units and the Low Impedance
units have blocking capacitors fitted. It should be noted that
each loudspeaker has a 1M ohm bleed resistor connected
across the blocking capacitor and this should be taken into
account when selecting the value of the end-of-line monitoring
resistance.
The end-of-line monitoring resistor can be connected across
the terminals on the end-of-line unit.
On 70V line units, the end- of- line resistor used must have
a minimum resistance value of 4k7 ohms and a minimum
wattage of 2.5 watts.
On low impedance units, the end-of-line resistor used must
have a minimum resistance value of 2k ohms and a minimum
wattage of 0.5 watts or a minimum resistance value of 500
ohms and a minimum wattage of 2 watts. On the low
impedance units, care must be taken with the polarity of the
monitoring voltage. If an end-of-line resistor is fitted to a unit,
the links on the printed circuit boards of all loudspeakers in the
line must be cut for the dc blocking capacitors to be in circuit in
order to dc monitor the line. (See Figure 4.)
10)
Maintenance, Repair and Overhaul
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards and
regulations.
Units must not be opened while an explosive atmosphere
is present.
If opening the unit during maintenance operations, a clean
environment must be maintained and any dust layer
removed prior to opening the unit.
The threaded flame path joints are not intended to be repaired.
Pub. 42004-502A
Tel: 800-492-1212
Fax: 610-796-5954