Mettler Toledo IND780 Installationshandbuch Seite 74

Figure 2-68: Serial Option Board
Figure 2-69: Serial Option Board Connector
Port connector assignments for this board are shown in Figure 2-70, and
termination for RS232, RS422 and RS485 in Table 2-17.
Table 2-17: Serial Option Board Pin Connections
Pin Signal
1 TxD
2 RxD
3 GND
4 TxD+
5 TxD-
6 RxD+
7 RxD-
8 +5V
9 +12V
10 GND
Function
RS-232 Transmit data
RS-232 Receive data
RS-232 Signal ground
RS-422/485 Transmit +
RS-422/485 Transmit -
RS-422/485 Receive +
RS-422/485 Receive -
+5V out, 0.5 A max.
+12V out, 0.5 A max.
Ground
IND780 Installation Manual
Pin 1
Notes
Jumper to RxD+ for RS-485
Jumper to RxD- for RS-485
Jumper to TxD+ for RS-485
Jumper to TxD- for RS-485
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