Mach LED 2
MC/SC
Dr. Mach
Lamps and Engineering
59160001-MCSC
Edition 06
08.05.2013 / Bak page 17/34
Installation instructions for LED-lights with communication / synchronization
After installing the ceiling flange, the central axis, the horizontal arm and the power supplies, the lights
must not be mounted to the spring arms yet.
Insert the 5-pole test adapter into the spring arm. The test adapter can be purchased at Dr. Mach. Then
the ceiling attachment is connected to mains. On the marked terminals of the test adapter the vo
28V DC and 0V must be checked.
In the next step it must be checked if there is a connection between the communication wire on the test
adapter and the corresponding wires on the ceiling flange. The communication wires on the flange are not
yet connected. All the communication wires in the flanges are loosen.
If the supply line with + 28V and 0V is correct, the light head can be mounted and connected. That means
that the test adapter has to be removed and the light head has to be connected.
Before connecting the light head please disconnect the ceiling attachment from mains. That means that
the power supply must be disconnected from mains on the primary side.
After disconnecting from mains please wait 20-30 seconds, until the capacitances on the power supplies
are discharged. In order to speed up this process, the light can be turned on.
After the light head has been mounted and connected, connect the power supply to the mains and check
the function of the light. All the functions on the keypad must work, there must be no error code on the
display, no triangle must be shown on the display.
If the light function is OK, then proceed the same way with the other lights of that ceiling attachment.
The
communication wires are not yet connected.
That will follow with the next step.
After all the lights of the ceiling attachment are working, please measure the voltages on the communica-
tion lines. The measured voltage on the communication line must be between 5V and 6V. The voltage
must be measured between the communication line and the blue terminals on the flange. This is the 0V
line (or in correct electrical terms the minus-line).
If these 5-6V are not measured on the communication line, then there is a fault on the communication
line. In the worst case the communication pin on the control board is damaged. If the communication pin
on the control board is damaged, the measured voltage is 0,6V up to 1,2V.
The 5-pole sliding contacts have 3 supply lines, one communication line and a fifth line which is not allo-
cated today. This fifth line is not connected in the light head either. There must not be measured any po-
tential on this line. This means that in case a measurement is done on this line, the measured value must
be 0V.
Due to the possibility of checking the lines by measuring the potential on them, the colour markings of the
wires are no longer the only criteria to install and connect the lights in a correct way.
Unfortunately we discovered that in the past the colours have been swapped because of changes of the
colours of the wires and because of wiring errors at spring arms and horizontal arms.
In case the 5-6V are measured on the communication lines of each single light, it means that the commu-
nication line is working correctly. Please disconnect the primary side of the power supplies from mains
again, so all light heads are current less.
Please wait again for 20-30 seconds, until the capacitances on the power supplies are discharged. In
order to speed up this process, the light can be turned on. Then the communication wires can be con-
nected to the orange terminals on the ceiling flange.
