RTS XCP-48-RJ45 Specifikace stáhnout pdf (Strana 38)

38 Chapter 9 DataFire 2000 Sync Adapter

Recommendations

Digi recommends shielded cables (15 pF or less capacitance per foot) for

all installations.

The FCC requires the use of shielded cables to comply with EMI/RFI

emission limits. In addition, cables that run long distances or through

electrically noisy areas are subject to voltage surges that can cause data

errors or equipment damage. EIA-232 specifies a maximum cable length of

50 feet. If you run cables farther than 50 feet, you increase the risk of surge

damage and data loss. (However, using shielded cable of 10-15 pF

capacitance per foot somewhat lessens the risk of data errors.)

When routing your cables, do not run them parallel to AC wiring or on top of

fluorescent light ballasts. Bundling several EIA-232 cables is acceptable

X.21 Pinouts

X.21, Male DB-15 Connector

Pin CCITT Description

9 103B TxD-

2 103A TxD+

3 105B RTS-

10 105A RTS+

4 104A RxD-

11 104B RxD+

5 106A CTS-

12 106B CTS+

13 115A RxCLKi-

6 115B RxCLKi+

7 113A TxCLKo-

14 113B TxCLKo+

8 n/a GND

Shell n/a CGND

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 151 152

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RTS XCP-48-RJ45 Specifikace Strana 38