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9M02-8978-A002-EN
Version 14
Safe-E-
Stop™
User Guide
Appendix IV: Troubleshooting
System
Communication Losses
Repeated communication losses from random PSDs may be caused by one of four factors:
Required Operating Range is Too Long
Required operational range is beyond system capability within the operating environment. The system
range will be about 300ft (100m) line of sight to the MSD antenna, but when machinery and obstacles are
interposed, this range will be reduced. If operating range is too short even when line of sight is within the
stated range, check the next three items. In the case of a ‘Frequency Diversity’ (Dual Channel) system, if
both channels are less than solid, check for common issues such as antenna, cable and faulty
equipment, if only one channel is below nominal, look for interference issues.
Bad Antenna or Coaxial Cable
Check that the coaxial cable is securely attached at the MSD and at the antenna ground plane, and that
the cable is dry and undamaged. Also check that the antenna is securely attached to the ground plane.
If the above are correct, check the resistance of the coaxial cable at the MSD between center and screen:
▪
If it is short circuit, the cable is faulty.
▪
If it is open circuit, then short circuit the connector at the antenna end and make sure that the
connector at the MSD end now shows a short circuit. If not, the cable is faulty.
▪
If all is OK, remove the short at the antenna end and reconnect the cable at both ends.
RF Interference
The PSS can only operate correctly in the absence of RF interference.
If RF interference is suspected, an audit of other wireless systems in the area should be conducted, if a
problem is found remove the source of interference or the Safe-E-Stop system frequency will need to be
reprogrammed at Cattron or an authorized service facility.
NOTE:
Use of Licensed frequencies will normally provide a protected RF environment; use of
unlicensed frequencies will require careful management on a site to ensure reliable system
operation.
MSD Radio is Faulty
If the items above have been eliminated as possibilities, the radio in the MSD may be faulty. This can be
checked by returning the MSD to Cattron for analysis and repair.