Dual system configuration – Yaskawa MP920 Communications Module User Manual

Page 102

5.7 CP-215 Repeaters

5-41

Standard System Configuration for Optical Repeater-TS

The following example shows the standard system configuration using two Optical Repeat-
ers.

Fig. 5.9 Standard System Configuration for Optical Repeater-TS

Dual System Configuration

The following example shows a Dual system configuration for Repeaters.

If the CP-215 transmission line consists of a simplex system, the respective Repeaters on the
upstream side of systems A and B can be switched to primary or standby Repeaters by using
the system A/B changeover contact input signal (CN2). Switch the current primary Repeat-
ers to standby Repeaters first, then switch the current standby Repeaters to primary Repeat-
ers. Be sure to follow this switching sequence. Set the system A/B changeover contact input
signal for the Repeaters on the downstream side to ON all the time, or turn ON pin 7 of
SW1.

When the Repeaters and transmission cables in the primary system fail, the standby system
will switch to the primary system to recover transmissions. A transmission error will exist
from the time the failure occurs until the standby system switches to the primary system.

The difference in the Repeater-to-Repeater cable length between systems A and B must be
less than 2 km.

CN4

CN1

CN3

CN1

CN4

CN3

Station

Repeater-TS

CP-215 branch bus

CP-215 main bus

TS2: 2 km
TS5: 5 km

CN3, CN4: FC connector

Two-core optical fiber cable

(TS2: Gl-50/125, 850 m, 200 MHz km, 2.5 to 3 dB/km)
(TS5: Gl-50/125, 1,300m, 200 MHz km, 0.7 to 1 dB/km)

170 m max. per 30 stations

Station