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Version 17
Safe-E-
Stop™
User Guide
Appendix E: Troubleshooting
Communication Losses
Repeated communication losses from random PSDs may be caused by one of four factors:
Required Operating Range is Too Long
Required operating 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 true, 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 now
shows a short circuit at the MSD end. If not, the cable is faulty.
▪
If everything 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. Otherwise, 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 onsite management 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.