00197042-04_SM_X-Serie-S_Customer_EN - 第89页
3 Power supply 3.5 Power supply and transformer module (from serial number Hxxxx) Service Manual SIPLACE X-Serie S 06/2019 89 Measurement with known reference voltage To conclude the self-test, check the voltage tester w…
3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
88 Service Manual SIPLACE X-Serie S 06/2019
Procedure for determining absence of voltage
Ensure correct handling of the voltage tester:
●
The measuring device may only be touched by the insulated test handles (up to inside
handles) and the test electrodes (testing tips) may not be touched!
Fig.98: Correct and incorrect handling of the voltage tester
Determining voltage tester functionality
Fig.99: Performing a self-test of the voltage tester
First perform a self-test of the voltage tester.
To do this, place the two testing tips to-
gether.
The voltage tester will be checked for
throughput and the LED throughput display
must be visible and an audio signal must be
heard.
After approx. three seconds you can discon-
nect the two testing tips again.
3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
Service Manual SIPLACE X-Serie S 06/2019 89
Measurement with known reference voltage
To conclude the self-test, check the voltage tester with a known reference voltage.
Fig.100: Test with reference voltage
You can use the service socket (if present)
on the power supply (disabled with "110V
option") or any other electrical socket.
Measure the voltage present between the
pins and at PE (ground).
Measuring the voltage absence directly after switching machine off
Fig.101: Check voltages
When the machine has been switched off,
the full voltage is still present at the meas-
urement points X303 and X304.
Measurement is always performed at the ref-
erence point (GND)!
●
X303 – X305 GND: 300+/‑10V OUT
●
X304 –X305 GND: 300+/‑10V
Test 300V IN_X303-X305:
Currently present voltage
Test 300V OUT_X304-X305:
LED display Output 1 at AC/DC converter
Green: Voltage over 220V
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 power packs PS1 and PS2 (300VDC):
3 Power supply
3.5 Power supply and transformer module (from serial number Hxxxx)
90 Service Manual SIPLACE X-Serie S 06/2019
Fig.102: LED status
Monitoring the voltage absence after switch-off
The voltage at the measurement points only discharges slowly.
After switch-off, the voltage drops from 300VDC to under 5VDC in approx. five minutes.
It is only then possible to pull the SMPS out of the machine without hazard and work on it.
Fig.103: Checking voltages (X-Series S from Hxxxx)
Fig.104: Measurement values
As soon as the voltage has undershot a value of 220VDC, the LED display on the power pack
changes!
DANGER
Measurement values below 5VDC
Measure between the following points:
► X303 (IN) – X305 (GND) < 5VDC
► X304 (OUT) – X305 (GND) < 5VDC