Dell UPS 3750R Uživatelský manuál stáhnout pdf (Strana 36)

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Additional UPS Features

Table 8. 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 ... 31 32 33 34 35 36 37 38 39 40 41 ... 51 52

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