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FP/FR1100/1200/2000 V6: Installation and Commissioning Manual 47
6.6 Network connections
6.6.1 NC2011/NC2051 ARCNET network cards
The NC2011 and NC2051 are interface cards required to network FP2000 Series fire
panels and FR2000 Series repeaters/emulators. All network nodes communicate via the
ARCNET protocol, using RS485 electrical (NC2011) or optical medium (NC2051). Every
node on the network - except the UN2000 - must have a network card installed as a
standard. The PCB is delivered with the necessary washers, nuts and spacers to allow for
proper mounting. All repeaters/emulators are supplied with a standard NC2011 (RS485)
network card. For more information refer to the Network Configuration Guide.
Figure 35: Network interface and associated connection
1. Repeater mode selection 8. NC2051 (Optical)
2. NC2011 (RS485) 9. Tx – Transmit A
3. Jumper J1 –Termination end of line 10. Rx – Receive A
4. Jumper J2 – Earth connection 11. Optical fibre connection channel A
5. Channel A 12. Tx – Transmit B
6. Channel B 13. Rx – Receive B
7. Screen 14. Optical fibre connection channel B
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