Westermo GDW-11 - Manual (Page 18)

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SIM interface under lid
Antenna interface
LED Indicators
(for details
see next page)
Connections GDW-11 485
RS-422/485
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
* Direction relative to this unit
DIP-switch S2
termination see
page 20–21
RS-232 D-sub
9-position Direction Description
No. 1 Out Data Carrier Detect (DCD)
No. 2 Out Receive Data (RD)
No. 3 In Transmit Data (TD)
No. 4 In Data Terminal Ready (DTR)
No. 5 – Signal ground (SG)
No. 6 Out Data Set Ready (DSR)
No. 7 In Request To Send (RTS)
No. 8 Out Clear To Send (CTS)
No. 9 Out Ring Indicator (RI)
Power connection screw terminal
2-position Direction Description
No. 1 In – VDC
No. 2 In + VDC