Point-To-Point Link
S5-95U, Second Serial Interface
2.1
Conection of Nodes in a Point-To-Point Link
A link can be set up in two ways:
•
Via a bus cable with transceivers (BT 777, S5-90U/S5-95U System Manual, Section 14)
or
•
via a direct cable ( Figure 2-4, 2-5). Use a 4-core, shielded cable with a cross-section of at
least 0.14 mm
2
. We recommend the 707-1 bus cable 707-1(Order number Appendix D).
Linking point-to-point master (TTY active) with point-to-point slave (TTY passive)
Cable length:
< 100 m
Figure 2-4 Pin Assignments Point-To-Point Master (TTY Active) -
Point-To-Point Slave (TTY Passive)
20 mA
TTY OUT+
TTY OUT -
M
M
20 mA
TTY IN+
TTY IN -
M ext
M ext
Point-to-point master
(e.g. S5-95U)
Point-to-point slave
(e.g. S5-90U/95U/100U/115U)
Shield/ M
ext
13
9
2
12
11
6
7
15
6
7
9
2
1
8
1
8
TTY IN+
TTY IN -
TTY OUT+
TTY OUT -
M ext
M ext
2-4
EWA 4NEB 812 6095-02
