Datasheet

Fibre Channel Interface
1-22 C141-C008
(8) Port out (+port A_out, +port B_out)
Port out signals are output by the drive.
These signals are differential copper with a termination of 50 Ω embedded in
HDC Chip and 100 Ω to output ECL signal label on the loop .
The output circuit is shown in Figure 1.9.
HDC
TX+
TX–
+ Port Out
– Port Out
outside of the drive
36
Ω
36
Ω
220
Ω
Figure 1.9 Fibre channel output circuit
(9) Port in (+Port A_in, +Port B_in)
These signals are differential copper with 100 Ω termination embedded in HDC
chip and are AC coupled with capacitors.
The input circuit is shown in Figure 1.10.
– Port In
HDC
RX–
RX+
+ Port In
36
Ω
36
Ω
220
Ω
Figure 1.10 Fibre channel input circuit
(10) –EN Bypass Port A/–EN Bypass Port B
These Enable Port Bypass Circuit (PBC) by a bypass signals, which is located
external to the drive.
The functional diagram of these signals is described in Section 1.1.4.
When the drive asserts this signal (low), the Port bypass circuit bypasses the drive
which is connected.