Delta Electronics AE57BSTD Quick Start Manual page 7

COM2 Port [AS38BSTD Series]
COM Port
R-
Note 1: When selecting Mode2 (for RS-485), D+ indicates that R+ and T+ is connected, and D-
indicates that R- and T- is connected.
COM2 and COM3 Port [AS57BSTD Series]
COM Port
Note: Blank = No Connection.
Dimensions
DOP-AS38BSTD(-W)
140.8
PIN
R-
R+
T-
T+
G
COM2
COM3
118.8 (4.68 )
+1 +0.04
0 0
MODE1 MODE2
RS-422 RS-485
RXD-
RXD+
TXD-
TXD+
GND
MODE1
PIN
RS-422
R- RXD-
R+ RXD+
T- TXD-
T+ TXD+
G
(for COM2 and COM3 both)
4-R3
36.7
T
English-6
D-
D+
D-
D+
MODE2
RS-485
D+
GND
NOTE:
T=1.6mm(0.06in) ~
3.0mm(0.12in)
Units:mm
D-