Sewha SI 550 - Behind of the SI550

- 10 -
SI 510 WEIGHING INDICATOR
3-4. Behind of the SI550
`
(1) AC Power input terminal
(2) External input terminal: User selectable 6EA
(3) Serial Interface terminal
Terminal
RxD
TxD
GND
C/L
C/L
RS – 232
Rx
Tx
GND
C/L
C/L
(4) Loadcell Input terminal
Terminal
EXC+
EXC-
SIG+
SIG-
SHLD
Loadcell
EXC+
EXC-
SIG+
SIG-
SHEILD
(5) Relay output terminal: User selectable 7EA (Function 141~147), COM is common.
Terminal
O1
O2
O3
O4
O5
O6
O7
OC
Relay
output
RELAY 1
RELAY 2
RELAY 3
RELAY 4
RELAY 5
RELAY 6
RELAY 7
RELAY
COM
(6) Analog output terminal
Terminal
-
+
Remark
4~20mA
(-)
(+)
Option
0~10V
(-)
(+)
Option
(7) Option serial interface terminal
Terminal
1
2
3
4
Remark
RS – 232C
GND
GND
Rx
Tx
Option
RS - 422
TxD-
TxD+
RxD-
RxD+
Option
RS - 485
Unused
Unused
D-
D+
Option
Please check the Comm. and other specification in the label, attached on the cover
plate first, and make connection according to that information.
(3)Serial I/F
(4)Loadcell Input
(1)Power
(5) Relay output
(2) External