Com1 And Com2 Serial Port Connections - Mettler Toledo IND780 Installationsanleitung

The standard ST30 USB connector allows USB-supported peripherals, such as keyboards, to be
attached to the IND780.
Figure 2-30 shows the locations of the Ethernet and USB connectors on the main PCB. In this case,
the PCB is mounted in a Panel enclosure.
2.6.1.3.

COM1 and COM2 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.
2.6.1.3.1. 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.
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Figure 2-30: Ethernet and USB Connections
Note that RTS and CTS hardware handshaking is not supported.
Pin
USB Connector
Figure 2-31: COM1 Port Connector
Table 2-2: COM1 Port Connections
Signal Function
TxD
1 RS-232 Transmit data
METTLER TOLEDO IND780 Installation Guide
RJ45 (Ethernet)
Connector
2-19