ABB ETL600 - Page 301

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A EN 15/37
1KHW001493-EN
EUT:
O4LE
remote
Connector X2
A14
C14
Terminal, telephony
8a
8b
Audio Analyzer
Generator Analyzer
110 µF
110 µF
110 µF
5.5 H
5.5 H
R
110 µF
110 µF
110 µF
5.5 H
5.5 H
EUT:
O4LE
local
Connector X2
A32
C32
Terminial, telephony
0a
0b
SUBSCR_Mess4.dsf
R = 2k2
U = 50 V
Figure 3
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.
EUT:
O4LE
remote
Connector X2
A32
C32
Terminal, telephony
0a
0b
Audio Analyzer
Generator Analyzer
110 µF
110 µF
110 µF
5.5 H
5.5 H
R
110 µF
110 µF
110 µF
5.5 H
5.5 H
EUT:
O4LE
local
Connector X2
A14
C14
Terminal, telephony
8a
8b
PAX2W_Mess5.dsf
R = 2k2
U = 50 V
Figure 4
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.