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16 Connectors/Pinouts

Xtreme/104 Opto User's Manual, ver. 0.00

Table 4: DB-9 cable connector pinouts

No.

RS-232

Signal

Direction

RS-485/422

Signal

Direction

1 NC NC RxD (+) input

2 RxD input RxD (-) input

3 TxD output TxD (+) output

4 NC NC TxD (-) output

5 Isolated Gnd signal gnd Isolated Gnd signal reference

6 NC NC CTS (-) input

7 RTS output RTS (+) output

8 CTS input CTS (+) input

9 NC NC RTS (-) output

Male DB-9 Connector

Technical Tip:

1. You must connect pin 5 (the isolated ground) to the

ground of the external device you are connecting to.

2. Please ensure that you terminate the CTS signal if your

application does not use them. The common way to do this

is to connect CTS to RTS. Failure to do so may result in a

loss of a performance on your Xtreme/104 Opto adapter.

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