Siemens SIMATIC S5-115F - Page 222

Communications Capabilities S5-115F Manual
Terminal diagrams for communications mode
The CP 523 assumes the following as peripheral device:
• Data terminal equipment, e.g. CP 521, CP 523, CPU 944
• Data communications equipment, e.g. a MODEM
CP 523 - CP 523 (TTY interface)
Figure 7-18. Pin Assignments for CP 523 to CP 523 (TTY Interface)
Ground
CP 523 (TTY active)CP 523 (TTY passive)
(2)
+
(2)
+
Ground
TTY IN - (8) (10) TTY OUT+
TTY IN+ (6) (22) 20 mA
TTY OUT+ (10) (20) 20 mA
TTY OUT - (12) (6) TTY IN+
(8) TTY IN -
(12) TTY OUT -
CPU 944 (TTY active) - CP 523 (TTY passive)
Figure 7-19. Pin Assignments for CPU 944 (TTY Active) to CP 523 (TTY Passive)
TTY IN - (2)
TTY OUT - (7)
(5)
+
+
CPU 944 (TTY active) CP 523 (TTY passive)
(12)
Ground
Ground
20 mA (11) (6) TTY IN+
TTY OUT+ (6) (8) TTY IN -
20 mA (13) (10) TTY OUT+
TTY IN+ (9) (12) TTY OUT -
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