ABB 265GS Operating Instruction page 35

Fig. 12: Communication mode: Point-to-point
A Pressure transmitter
2 Supply unit
Fig. 13: Communication mode: FSK bus
1 FSK bus
2 Supply module with HART isolation
IM/265Gx/Ax-EN-07
A B
+
p
U
B
+
#
–
2
2600T
1
RS 232C
+
p
U
B
+
#
–
I + FSK
2600T
A
+
p
U
B
+
#
–
I + FSK
2600T
A
265Gx, 265Ax
Electrical connections
2
R
+
U
S
–
I + FSK
A
1 FSK modem
2 Possible connection points for a modem
between A and B
+
4 ... 20 mA
R
U
S
1
–
2
+
4 ... 20 mA
R
U
S
1
–
2
RS 232C
3
3 FSK modem
M00010
M00011
35