3. Cabling
3-79
TI 32P01J10-01EN
Using SEC402 ESB bus coupler module, up to 13 SNB10D safety node units (*1) can be
connected to S2SC70
/SSC60
safety control unit. SEC402 has two ports to connect ESB bus
cables. Up to 9 SNB10D units can be connected to each of the upper and lower port, and up to
13 SNB10D units can be connected to SEC402 as a total of the upper and lower ports.
SEC402 can work normally even when node units are only connected to either of the two ports,
leaving the other port vacant and not terminated. ESB Bus communication is available at this
condition.
*1:
To connect 10 or more SNB10Ds, CFS1350 Node Expansion Package is required.
The following are examples of ESB bus connection using SEC402.
SNB10D
F030805.ai
SNB10D
SNB10D
Cabinet 1
rear
*1: Length of ESB buses must be 10 m or shorter each from the upper and lower port of SEC402.
front
ESB bus (*1)
S2SC70S/D
SEC402
Cabinet 2
ESB bus (*1)
Figure ESB bus Connection when Two Cabinets are Used
SNB10D
F030806.ai
SNB10D
SNB10D
Cabinet 1
Cabinet 3
*1: Length of ESB buses must be 10 m or shorter each from the upper and lower port of SEC402.
ESB bus (*1)
S2SC70S/D
Cabinet 2
SEC402
ESB bus (*1)
Figure ESB bus Connection when Three Cabinets are Used
Nov. 27, 2015-00