Section 4 – Installation Information (Continued)
Telemotive Laser Guard Instruction Manual – October 2009
12
done in a static mode. Therefore, disregard the
operation of these circuits during the installation.
After the installation has been completed, you may
have to wait 30 seconds before you can perform a
dynamic test of the system.
The Laser Optical Path Fault Detector may be tested
by bringing the laser to a distance from the target that
is between the first and second range points, then
momentarily block the laser’s view of the target.
This should cause a 30 second fault, which will light
DS7 on the control board. If it does not, reduce the
distance between the laser and the target and repeat
the test. The required point to perform this test will
vary with the application, depending on the range
point settings used for the application.
CAUTION
DO NOT WAIT FOR A FAULT TO OCCUR BE-
FORE PERFORMING PREVENTIVE MAINTE-
NANCE. DO NOT CONTINUE TO RELY ON
THE LASER GUARD SYSTEM IF A FAULT HAS
OCCURRED UNTIL MAINTENANCE HAS COR-
RECTED THE PROBLEM.
4-9.
Troubleshooting (refer to
Table 4-2
).
If the red LED on the laser head comes on
continuously, replace the laser unit. Do not try to
service it. Return it to the factory.
If the red LED on the laser head is blinking or the
green LED on the back of the laser head is not on or
blinking, check for +12V at terminals marked 12V
and 12V COM at J2 on the range detector module. If
12V is not present, check the power supply and
power input modules in the range detector unit. If
12V is present, turn the power off and check the
continuity of the cable (refer to Figures
6-3
,
6-4
,
6-5
,
6-6A
and
6-7
). Replace defective sub-assemblies as
necessary. If none are found, replace the laser head.
When the laser head is greater than 150 ft. from its
target, or a piece of black paper is placed over one of
the laser's lenses (do not touch or scratch the lenses)
the following conditions should exist on the range
detector module:
The three red LEDs (DS1, DS2 and DS3) (refer to
Figure 6-13
) next to each range detector should be lit,
and the red LED (DS4) by the fault detector should
be lit. The two out-of-sequence red LEDs (DS5 and
DS6) should be off. If one or both of the out-of-
sequence LEDS are on, check the three test point
voltages and see that they meet the following
relationship:
150 ft.
≥
RANGE 1> RANGE 2> RANGE 3
≥
10 ft.
If the above relationship is not correct, redo range
detector module settings. (
Refer to Section 4-7
)
If the out-of-sequence LEDs (DS5 and DS6) are not
on, and any of the range detector or fault LEDs (DS1,
DS2, DS3 and DS4) are off, check the voltage
between signal in and COM at J2. Your meter should
read between 0.3 VDC and 1.5 VDC. If the voltage is
less than 0.3 VDC, either the laser cable is open or
the laser unit has detected a fault condition within
itself and must be replaced. If the voltage is within
range, then check the third range detector test point
and make sure it is above 2 VDC. If it is not, then
redo the range detector module settings.
If 12 VDC is not present at the range detector
module, check the fuse, power to the input of the
power supply, power at the output of the power
supply and power to the 12 VDC terminals of J2 on
the range detector module. Correct any problems
found.
If you cannot determine the source of your problem,
please contact Telemotive.
If a laser head fault is detected with the style B
(E14008) range detector board the unit will
momentary shut down the power to the head to
attempt to reset the fault. If the fault is not reset after
the first reset. The range detector board will not
attempt another reset.
