Dell UPS 1920T Uživatelský manuál stáhnout pdf (Strana 47)

47

Additional UPS Features

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Table 9. RS-232 Communication Port Pin Assignment

Pin

Signal Name Function Direction from the UPS

1 Unused —

2 Tx Transmit to external device Out

3 Rx Receive from external device In

4 Unused —

5 GND Signal common (tied to chassis) —

6 Unused —

7 Unused —

8 Unused —

9 Unused —

*Unused pins must be left free on all models.

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 62 63

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