“1” if the module is mounted onto the safety control unit or the safety node unit.
• Switches 2 to 5: Always “0”
• Switches 6 to 8: Used for maintenance. Usually “0” for routine operation.
Make sure that the DIP switches are correctly set.
l
Fiber-Optic Cable Connector
This connector is used for fiber optic cable. Use the following fiber-optic cables.
Table 4.5-2 Fiber-Optic Cable Specifications
Specifications
Optical connector type Type LC (conforming to the IEC 61754-20)
Max. permissible optical loss
0 to 16 dB@1.3 μm: SNT401 and SNT501
3 to 16 dB@1.55 μm: SNT41
1 and SNT511 style S2 and higher(*1)
1 to 16 dB@1.55 μm: SNT411 and SNT511 style S1(*1)
Fiber-optic ca-
ble
Type
Quartz singlemode fiber
(JIS C 6835 T
ype SSMA-9.3/125 or IEC 60793-2-50 Type B1.1)
Number of
cores
2-core
Max. length
50 km: SNT411 and SNT511
5 km: SNT401 and SNT501
*1: When using SNT411 and SNT511 modules, if any of the SNT411 or SNT511 modules are style S2 or higher, make sure that
the optical attenuation between the SNT41
1 and SNT511 modules is at least 3 dB. If the attenuation is less than 3 dB, use an
attenuator.
If all of the SNT411 and SNT511 modules are style S1, make sure that the attenuation is at least 1 dB. If the attenuation is
less than 1 dB, use an attenuator.
It is possible to mix styles S2 and S1.
l
ESB Bus Cable Connector
This connector is used for ESB bus cable (YCB301).
The connector unit with the terminator for the ESB bus is attached, since the optical ESB bus
repeater slave module (SNT501/SNT511) is always at the end of the ESB bus.
<4.5 Optical ESB Bus Repeater Module > 4-19
IM 32Q06C10-31E 4th Edition : Jan.30,2015-00
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