When SNT401/SNT501, SNT411/SNT511 and S2EN501 are mixed, fiber-optic cable is extendable maximum 50 km.There is a following restriction.

Example:
When combination of SNT401 and SNT501 and that of SNT411 and SNT511 are mixed and the length of cable for SNT401 and SNT501 is 5 km, the length of cable for SNT411 and SNT511 must be as long as 45 km (50 km – 5 km).

RESTRICTIONS AND CAUTIONS FOR MOUNTING
• Combination of SNT411 and SNT511 or that of SNT401 and SNT501 can be placed in the same SCS at the sametime.
• Mount a set of Optical ESB Bus Repeater Module for duplex on a pair of continuous slots. The module for ESB Bus1 is always mounted on a slot with odd number, and the module for ESB Bus 2 on a slot with even number.
• When mounting on SNT10D at 60 to 70 °C, leave two slots next to Power supply module and mount one set inevery two slots, and leave two slots between one set SNT11. Unit for Optical Bus Repeater Module (SNT10D) is aunit to install Optical ESB Bus Repeater Modules. Refer to “Unit for Optical Bus Repeater Module (Rack MountableType)” (GS 32Q06K11-31E).
• For restrictions regarding mounting S2SC70, SSC60, SSC50 and SNB10D, refer to “ProSafe-RS Outline ofI/O Modules (for FIO)” (GS 32P06K60-01EN).
• Serial communication modules (ALR111 and ALR121) cannot be mounted on SNB10D placed more than 5 km awayvia optical ESB bus repeater module.

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