4.5
Optical ESB Bus Repeater Module
An optical ESB bus repeater module converts electric signals sent through the ESB bus con-
necting safety control unit to the safety node unit and safety node unit to another safety node
unit, into optical signals. As a result, it is possible to extend the transmission distance.
The optical ESB bus repeater module is connectable to safety control unit, safety node unit,
and the unit for optical bus repeater module. The type of module (master or slave) determines
which unit it is connectable to.
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Types of Optical ESB Bus Repeater Module
The following models of optical ESB bus repeater modules are available: The optical ESB bus
repeater module must always be dual-redundantly configured.
Table 4.5-1 Optical ESB Bus Repeater Module
Model
Name
Description
SNT401
SNT411
Optical ESB bus repeater master mod-
ule
• Mountable units:
Safety control unit
SSC10S/SSC10D: SNT401
SSC60S/SSC60D, SSC50S/SSC50D: SNT401/
SNT411
Safety node unit
Unit for optical bus repeater module
• Module types:
Connector unit for ESB bus
Connector unit with terminator for ESB bus
• Total transmission maximum length of fiber-optic
cable(*1)
5 km: SNT401
50 km: SNT411(*2)
SNT501
SNT511
Optical ESB bus repeater slave module
• Mountable units:
Safety node unit
Unit for optical bus repeater module
• Total transmission maximum length of fiber-optic
cable(*1)
5 km: SNT501
50 km: SNT511(*2)
*1:
With SSC60S/SSC60D, SSC50S/SSC50D, even if the optical ESB bus repeater modules are used on two levels, the maxi-
mum extension length of the optical fiber cable is 50 km.
*2:
The minimum length is 5 km.
CAUTION
This product is a laser class 1 product acceptable IEC 60825.
class1 laser product
<4.5 Optical ESB Bus Repeater Module >
4-17
IM 32Q06C10-31E
4th Edition : Jan.30,2015-00
