Westermo TD-36 User Manual
Page 19
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19
6618-2202
RS-422/485
Power
I/O Input/Relay Output
LED Indicators
(for details see page 22)
* Direction relative to this unit.
* Direction relative to this unit
Position Direction* Description Product marking
No. 1
In
AC: Neutral
DC: –Voltage
No. 2
In
AC: Line
DC: +Voltage
Position Direction* Description
Product marking
No. 1
In
R+ ( A’) Receive
RS-422/485 4-wire R+
No. 2
In
R– (B’) Receive
RS-422/485 4-wire R–
No. 3
Out
T+ (A) Transmit
RS-422/485 4-wire T/R+
In/Out
T+ (A/A’) Transmit/Receive RS-485 2-wire
No. 4
Out
T– (B) Transmit
RS-422/485 4-wire T/R–
In/Out
T+ (A/A’) Transmit/Receive RS-485 2-wire
Position
Direction* Description
Product marking
No. 1
In
Input +
+
No. 2
In
Input –
–
No. 1
In/Out
Normal
closed contact
NC
No. 2
In/Out
Common
contact
C
No. 3
In/Out
Normal
open contact
NO
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