TVC Ethos Two - 10.4. Serial Network - EMC Guidelines; 10.5. Serial Network - Fault Finding Procedures

Page 55 of 102
TVL 351
ISSUE 15
If the optional landing network is not fitted provision for wiring landing calls will be made within the panel on call
expansion modules.
10.4. Serial Network - EMC Guidelines (CAN / Ethernet / RS485 / RS232)
It is extremely important that the following guidelines are adhered to:
To maintain the high performance of this control system and its associated peripherals it is essential you follow the
EMC and safety instructions below.
 All bus runs must be kept away from motor wiring, a separation of at least 300mm.
 Keep bus wiring away from mains.
 If wiring has to cross any high voltage cable this must be done at right angles.
 Nodes must be mounted away from any high voltage equipment e.g. motors, door gear etc.
 Mains power input and motor output cables should be shielded and earthed as per panel
drawings.
 Any screens in the trailing cables must be earthed at both ends.
 Networks must be correctly terminated, with a termination board on the landing network and
with termination DIP’s on the last car board in the system.
10.5. Serial Network - Fault Finding Procedures
Fault Finding Within a System
With power applied to the system check that all nodes have their green LED’s flashing. If the green LED’s are not
flashing check the power supply on the power feed board.
Check solutions screen and active events in the Ethos Two for any relevant problems
A network failing to respond on power up could be caused by :
 Incorrect or broken wiring connection on the network.
 No nodes connected to the network.
 One or both of the network power supplies not working or connected.
 None of the nodes configured correctly.
If a network has failed to respond to commands sent out by the Ethos Two then repeated tries will be made to
establish communication. When the network connection is established this is also reported as an event in the Ethos
Two event log.
System checks
After testing an installation as described above and having no response to calls placed in the system the following
need to be checked:
 That the panel is on normal mode.
 The DIL switches are set correctly on all boards and termination boards and termination DIL
switches are fitted where necessary.
 All network connections are connected to the correct terminals.
 Both networks are connected to the panel connections. (If landing network fitted)
 The car and landing networks are not swapped over. (If landing network fitted)
 Check that the green LEDs' on both Car and Landing nodes are flashing
 Check nodes for red fault LED’s. see relevant board installation sheet for description.
 If the green LEDs' fail to illuminate then the 24 volt supply is not connected to the node
 Check external feeds to the car boards
If all of the above are correct then the networks should function correctly.