Com1 Serial Port Connections - Mettler Toledo IND780 Manual De Instalación

IND780 Installation Manual

COM1 Serial Port Connections

The COM1 port includes connections for RS232, while COM2 supports connections
for RS-232, RS-422 and RS-485. The Interface parameter (in Setup at
Communication > Serial) must be set to match the hardware connection used.
This parameter controls how the transmit and receive lines are controlled.
COM1 Serial Port
Figure 2-31 indicates which terminal represents which signal on the COM1 Port,
and Figure 2-32 shows how the port is wired for an RS232 connection. Make the
connections as necessary. Table 2-2 describes the functions for each signal in the
COM1 port connector.
Pin
1
2
3
4
5
6
2-20
Figure 2-31: COM1 Port Connector
Table 2-2: COM1 Port Connections
Signal
TxD
RS-232 Transmit data
RxD RS-232 Receive data
GND RS-232 Signal ground
RTS
RS-232 Request to send
CTS RS-232 Clear to send
+12V
+12V Out, <0.5 A
Figure 2-32: COM1 Wiring for RS232
Function