ABB ETL600 Instruction Manual page 301

Revision:
A
B.10.5 Pax 2-wire
The following tests must only be done, if the operation mode 'Pax 2-wire' is configured at the local
equipment.
1. Check the Output level of pax 2-wire interface:
Use coupling bridges similar to that, shown in Figure 4. The resistor R should be chosen
to 500 Ω, included the resistance of the two coils. If the coupling bridge has polarity.
Check first polarity at appropriate, telephony, 0a-0b and observe polarity of external
voltage source.
2. Feed a 800 Hz tone, with the configured level from remote side into remote equipment.
Take a measurement of the output level at the local equipment. It should be in 1 dB range
of the configured output level from the local equipment.
3. Check PAX-BLOCKING relay. In normal operation contacts at terminal, telephony, 6b-7a
should be closed and contacts 6a-6b should be open. Check it.
Switch off the remote equipment, after the programmed delay time the link alarm occurs.
Language:
EN
EUT:
O4LE
remote
A14 8a
C14
8b
EUT:
O4LE
local
A32
0a
C32
0b
SUBSCR_Mess4.dsf
EUT:
O4LE
remote
A32 0a
C32 0b
EUT:
O4LE
local
A14 8a
C14 8b
PAX2W_Mess5.dsf
Page:
15/37
R = 2k2
5.5 H
110 µF
110 µF
5.5 H
110 µF
U = 50 V
R
5.5 H
110 µF
110 µF
5.5 H
110 µF
Figure 3
R
5.5 H
110 µF
110 µF
5.5 H
110 µF
R = 2k2
5.5 H
110 µF
110 µF
5.5 H
110 µF
U = 50 V
Figure 4
1KHW001493-EN
Audio Analyzer
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Audio Analyzer
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