Impulse 2403 - Manual (Page 10)

Configuration
Sealevel Systems SeaPORT+4 Page 7
Switch Examples Continued
Port 4 Port 3 Port 2 Port 1
Figure 3: Electrical Interface Configuration
Port 1 : RS-232
The corresponding shunt is in the 232 position. The switches will have
no effect.
Port 2 : RS-485 two wire communication with no echo.
The corresponding shunt is in the 422/485 position. Switches 485 2,
NE 2, and Port 2 L, L, T, PU, and PD are all in the ON position.
Port 3 : RS-422 with 120 ohm termination.
The corresponding shunt is in the 422/485 position. Switches 485 3,
NE 3, and Port 2 L, L, PU, and PD are all in the OFF position, T is in
the ON position.
Port 4 : RS-485 two wire communication with echo.
The corresponding shunt is in the 422/485 position. Switches 485 4,
and Port 2 L, L, T, PU, and PD are all in the ON position, NE 4 is in
the OFF position.
RS 232 RS 232 RS 232 RS 232 RS 422/485 RS 422/485 RS 422/485 RS 422/485
Port 3
L
L
T
PU
PD ON
12
3
4
5
6
7
8
OF
F
91
0
Port 4
L
L
T
PU
PD
ON
12
3
4
5
6
7
8
OF
F
91
0
Port 1
L
L
T
PU
PD
Port 2
L
L
T
PU
PD
E1 E4 E3 E2 E5 E6 E7 E8
SW2 SW4