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Technical Description

Sealevel Systems DIN485+ Page 9

Technical Description

The Sealevel Systems DIN485+ converts an existing RS-232 serial port into a DIN rail mountable, field selectable

RS-422/485 port for industrial automation and control applications.

Connector Pin Assignments

Power/RS-232 Pin Assignments (6 Position Screw Terminal)

Signal Name Pin # Mode

TD Transmit Data 1 Input

RD Receive Data 2 Output

RT Request to Send 3 Input

+V +DC Supply Input 4 Input

-DC Supply Input 5 Input

Shield 6 Input

Technical Note: The modem control signals are biased in the following fashion when using Sealevel’s’ CA-186

cable: RTS and CTS are connected, DTR is connected to DCD and DSR, and RI is tied inactive.

RS-422/485 Pin Assignments (6 Position Screw Terminal)

Signal Name Pin # Mode

RDB R+ Receive Data Positive 7 Input

RDA R- Receive Data Negative 8 Input

TDB T+ Transmit Data Positive 9 Output

TDA T- Transmit Data Negative 10 Output

GND

Ground 11

SHIELD

Shield 12

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18 19

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Impulse 1104 Manuale Utente Pagina 11