Westermo ID-90, Руководство по установке

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I 1 R+ (A’) ID-90 Receive
I 2 R– (B’) ID-90 Receive
I/O 3 T+ (A) ID-90 Transmit, at RS-485
I/O 4 T– (B) ID-90 Transmit, at RS-485 Bidirectional
– 5 Shield If shielded cable is used, connect the shield
only at one end to avoid ground currents.
– 6 T4 Termination 4-wire, connect to terminal 2
to terminate a 4-wire connection.
– 7 T2 Termination 2-wire, connect to terminal 3
to terminate a 2-wire connection.
– 8 2-/4-wire 2/4 wire input selector. Input open selects
2-wire and connected to terminal 9 for 4-wire.
– 9 S1 Select 1. Wired to terminal 8 when 4-wire
connection is used. Internally connected to
+5V via pull-up resistor.
5 6607-2213
I = input O = output on ID-90
The definations R+/R–, T+/T– can be various between different manufactures.
ID-90 uses the defination that in a “MARK”-condition R+/T+ is more negative than R–/T–.
Description
Direction
Terminal Name
RS-422/485 interface connection
The ID-90 is supplied with a RS-422/485 interface.
The RS-422/485 interface is internally in parallel to the RS-232/V.24 interface using the
9-pole D-sub. The two interfaces can not be used or be connected simultaneously, but the
interface connected will automatically be selected as the DTE source.
The RS-422/485 connections are made as shown below. Please note that the selection
of 2- or 4- wire and termination or no termination is done by linking between some of the
screw terminals.
Termination
4-wire
Termination
2-wire
4-wire
Connection
of RS-422
Connection
of RS-485
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9