00198146-01_AI_120V_TX12_de_en.pdf - 第63页

Assembly Instructions / Montageanleitung SIPLACE TX Series Option 120 V 04/2017 4 Appendix 4.1 Excerpts from the Service Manual 63 Monitoring the Voltage Absence After Switch-Off The voltage at the measurement points X30…

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4 Appendix
4.1 Excerpts from the Service Manual
Assembly Instructions / Montageanleitung SIPLACE TX Series
Option 120 V 04/2017
62
Measuring the Voltage Absence Directly After Switching Machine Off
When the machine has been switched off, the full voltage is still present at the measurement points
X303 (in) and X304 (out).
Measurement is always performed at the reference point X305 (GND)!
► Pull the power supply out towards the front (see Pulling out the Power Supply).
Fig.24: Measuring points
1. Measuring points at power supply
Test 300V IN_X303-X305:
Currently present voltage
Test 300V OUT_X304-X305:
LED display Output 1 at AC/DC converter
Green: Voltage over 220V
The power pack shows an LED display for output
1 > 220 V in green, which means that the voltage
is still over 220 V!
The following figure explains the LED status of the PS1 power pack (300 VDC):
Fig.25: LED status PS1-PS2 300VDC
Assembly Instructions / Montageanleitung SIPLACE TX Series
Option 120 V 04/2017
4 Appendix
4.1 Excerpts from the Service Manual
63
Monitoring the Voltage Absence After Switch-Off
The voltage at the measurement points X303 (IN PS1/PS2) and X304 (OUT CAP) only discharges
slowly.
After switch-off, the voltage drops from 300VDC to under 5VDC in approx. five minutes.
Fig.26: Measuring voltage
As soon as the voltage has undershot a value of 220VDC, the LED display on the power pack
changes!
Fig.27: Measuring voltage
DANGER
Measurement values below 5VDC
Measure between the following points:
► X303 (IN) – X305 (GND) < 5VDC
► X304 (OUT) – X305 (GND) < 5VDC
4 Appendix
4.1 Excerpts from the Service Manual
Assembly Instructions / Montageanleitung SIPLACE TX Series
Option 120 V 04/2017
64
Fig.28: LED on the capacitor battery(CAP)
► Check the LED on the capacitor battery
(CAP).
 DANGER!
Once the LED on the capacitor battery
(CAP) does not light any longer, it is pos-
sible to work on the power supply without
hazard!
.