Technical data

Computing Unit Expansions
4-30
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
4.10 Switch Adjustment/Jumpers
TTY jumpers (S1)
S1-1 S1-2 Function
On On Active TTY port (default setting)
On Off TTY loop transmit isolated from power source (passive setting)
Off On TTY loop receive isolated from power source (passive setting)
On
Off
1
2
Figure 4-23 Jumper Setting, TTY Port Active