Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
9. Switching on the power supply<br />
Prerequisite: You have laid all cables and connected all devices apart from the<br />
power supply unit as per the enclosed product leaflets. Note: You can also find<br />
all product leaflets in the chapter ”Product leaflets” from Page 79.<br />
9.1 Checking the cable network<br />
You must check the cable network completely before switching on the system's<br />
supply voltage:<br />
Group bus (data line, speech line, power supply line)<br />
Ward bus (data line, speech line, power supply line)<br />
Secondary lines (data line, power supply line)<br />
9.2 Installing the power supply unit<br />
Before connecting the power supply unit, check the cables to the power supply<br />
unit to ensure that there are no short circuits and electric earth connections.<br />
Install the power supply unit as per the installation instructions enclosed with<br />
the power supply unit. You can also find all installation instructions in the<br />
chapter ”Product leaflets” from Page 79.<br />
9.3 Checking the power supply<br />
The operating voltage of the entire system is +24 V direct voltage. The system<br />
components are supplied with power supply units.<br />
Perform the tests described below:<br />
9.3.1 Test the power supply unit's output voltage<br />
Use a voltmeter to test the power supply unit's +24V output voltage.<br />
9.3.2 Test the +24V ring loop for continuity<br />
Disconnect one end of the ring loop from the power supply unit. Switch on the<br />
power supply unit and use a voltmeter to measure the voltage at the free wire<br />
ends. If there is no voltage present, the ring is not closed or a wire (+24V or<br />
GND) has been interrupted.<br />
CONCENTO PLUS - <strong>Technical</strong> <strong>Manual</strong>, 11/12 (Rev. 3.0), 00 8814 14<br />
67
Change language