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6.6.4 Connecting optical fiber cable
・ Incorrect cabling may cause a disaster such as electrical shock or fire. Only a qualified person should perform
cabling. Before touching the power supply circuit (e.g., for cabling after power on), be sure to turn off (i.e.,
open) the circuit breaker to prevent electrical shock.
・ Note that the smoothing capacitor is charged after turning off (i.e., opening) the circuit breaker and touching it
causes an electrical shock. Ensure that the charge lamp (CHARGE) of the inverter has gone off and that the DC
voltage of the inverter has lowered to a safety level using a tester.
・ Do not use the product that is damaged or lacking parts to prevent an injury or damage.
・ Incorrect handling in installation/removal jobs could result in a broken product.
・ The cable may be pinched by the surface cover. To protect the cable, it is required to attach a fixing jig to guide
the route or spiral tube around the cable.
・ If the plastic optical fiber is bent with curvature of 35 mm or less for a long period of time, the inter-interval
link error "
erb
" may occur to generate an alarm, causing the inverter output shutdown and leaving the motor
to coast to stop. Keep the curvature 35 mm or more.
・ The plastic optical fiber allows a strong light (e.g., flashlight) to pass. A strong light may cause the
inter-interval link error "
erb
" to generate an alarm.
Use the supplied optical fiber cable to connect the inverter and the high-speed serial communication-
capable terminal block. Note that the colors of the plugs at the ends of the cable are different; light gray
and dark gray. Be sure to match the colors of the plug and connector when connecting them. Connect the
inverters in a daisy-chain method. For example, when connecting three inverters (1, 2, and 3), use three
cables to connect them in a loop in such a way: 1→2→3→1.
Table 6.6.4 Optical Connectors of High-Speed Serial Communication-Capable Terminal Block
Part number Name Color Overview
T-1528 TX Light gray Transmitter (optical communication)
R-2528 RX Dark gray Receiver (optical communication )
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