Test The Loop Integrity (Power Cables) - Baldwin Boxall OmniCare Installation Manual

OmniCare EVC System
Installation & Commissioning Manual

6.2.3 Test the Loop Integrity (Power Cables)

74
C
A U T I O N
Ensure Mains Power is disconnected before connecting or
disconnecting Ring Circuits.
1. At the Master Panel, connect one end of the first ring circuit
to the "A" terminations (refer to Figure 2.2 on page 14).
Ensure the unconnected cables on the other end of the ring
are suitably positioned to prevent short circuits.
N : If the "B" connections are also made during commissioning the
OTE
panel will automatically route data and power around the ring. This
makes diagnosis of any cable faults much more difficult.
2. Connect the Mains Power, but do not connect the batteries.
3. Press the "FAULT ACCEPT" button to accept the faults and
silence the buzzer.
4. Using a voltmeter, check the voltage across the "+V" and
"0V" terminals on the "A" circuit is approximately 30V DC.
Wait for 10 seconds and then check the return voltage on the
"+V" and "0V" cables ("B" circuit) is higher than 22V DC.
N : The actual return voltage depends on the number of Remote Units
OTE
and the cable length of the loop.
C
A U T I O N
If the reading on the return cables is less than 22V DC then power
is not being fed along the loop.
Investigate the circuit wiring before proceeding.
5. To locate a power fault, walk around the loop from the "A"
connection and check the "SYSTEM OK" LEDs on the
Remote Units.
The first unit that does not have a FLASHING "SYSTEM OK"
LED has not received power.
6. Check the terminations on that Remote Unit to ensure the
"+V" connection is made correctly and is secure.
7. Measure the voltage on the "+V" OUTPUT of the
PREVIOUS Remote Unit on the loop:
C O M M U N I C A T I O N S
OmniCare issue 1