3. Cabling
3-82
TI 32P01J10-01EN
Optical ESB Bus Repeaters use fiber-optic cables to connect an SNT401/SNT411 Optical ESB
Bus Repeater Master Module and an SNT501/SNT511 Optical ESB Bus Repeater Slave Module
to each other.
When S2SC70
, SSC60
, SSC50
or SSC57
is used for the safety control unit, SNT401,
SNT411, SNT501 and SNT511 are available.
You can connect these devices in the structures of star and chain type connections.
In one method, optical ESB bus repeater module unit (SNT10D) is used and in the other, it is not.
Examples of connecting optical ESB bus repeater modules are shown below using SNT401 and
SNT501. The same connection can be applied to SNT411 and SNT511.
Star Type Connection
Star type connection is possible when connecting SNT401/SNT411 installed on S2SC70
/
SSC60
/SSC50
/SSC57
(safety control unit) or SNT10D (unit for Optical ESB bus repeater
module) to SNT501/SNT511 installed on SNB10D (safety node unit).
Fiber-optic cable for ESB bus can be star-connected to SNT501/SNT511.
Example of not using SNT10D
F030809.ai
S
N
T
4
0
1
S
N
T
4
0
1
S
N
T
4
0
1
S
N
T
4
0
1
S
E
C
4
0
2
S
E
C
4
0
2
S
C
P
4
6
1
S
C
P
4
6
1
P
S
U
P
S
U
: Fiber-optic cable
: A bold frame shows a module with terminator.
S
N
T
4
0
1
S
N
T
4
0
1
S
S
B
4
0
1
S
S
B
4
0
1
S
S
B
4
0
1
S
S
B
4
0
1
S
N
T
4
0
1
S
S
B
4
0
1
SNB10D
SNB10D
ESB bus
ESB bus
ESB bus
I
O
M
I
O
M
I
O
M
I
O
M
I
O
M
I
O
M
S
N
T
5
0
1
S
N
T
5
0
1
P
S
U
P
S
U
I
O
M
I
O
M
I
O
M
I
O
M
I
O
M
I
O
M
S
N
T
5
0
1
S
N
T
5
0
1
P
S
U
P
S
U
Total length of Fiber-optic cable
S2SC70
D
NIU
S
2
E
N
5
0
1
P
S
U
P
S
U
S
2
E
N
5
0
1
Figure Star Type Connection: Not Using SNT10D
Oct. 25, 2016-00