Westermo MA-67 - Manual (Page 5)

11 6067-2001
Termination with fail-safe 1)
S2
1) The fail-safe function forces the signal state of the
receiver to OFF when the connected transmitter is in
tri-state transmitter inactive). The receiver located
furthest away shall be terminated.
ON
1 2 3 4 5
Termination (2-wire)
S2
ON
1 2 3 4 5
Termination (4-wire)
S2
ON
1 2 3 4 5
No termination
Transmitted power
S2
ON
1 2 3 4 5
Low
S2
ON
1 2 3 4 5
High
Typical attenuation
in connectors
0.2-0.4 dB
Typical attenuation
in splice
Fusion 0.1 dB
Mechanical 0.2 dB
Power budget
Fibre 820 nm 1300 nm Single mode 820 nm 1300 nm Single mode
Min. values Min. value Min. value Typ. value Typ. value Typ. value
50/125 µm 10.7 dB
62,5/125 µm 14.5 dB 11.6 dB 18.6 dB 15.1 dB
100/140 µm 20 dB
9/125 µm 6.3 dB 12.3 dB
Fibre Attenuation Attenuation Attenuation
at 820 nm at 1300 nm at single mode (1300 nm)
50/125 µm 3.0 dB/km 1.0 dB/km
62,5/125 µm 3.5 dB/km 1.2 dB/km
100/140 µm 4.0 dB/km
9/125 µm 0.5 dB/km
Attenuation in fibre cable
The values below can differ depending on quality and manufacturer of the fibre-optic
cable.
”Min. value” states the minimum guaranteed power budget. Experience shows however that the
typical value is in the range of the indicated ”Typ. value”.