Mettler Toledo IND570 Manual Del Usuario página 51

2.4.5.5. COM1 Serial Port Connections
The COM1 port includes connections for RS-232, RS-422 and RS-485. There is a setup parameter
that must be selected to match the hardware connection used. This parameter controls how the
Transmit and Receive lines are controlled.
Figure 2-32 indicates which terminal carries which signal on the COM1 port. Make the connections
as necessary.
Terminal Signal Notes
TxD Transmit RS-232
RxD Receive RS-232
GND Logic Ground
TxD1+ +Transmit RS-422, RS-485 Jumper to RxD1+ for RS-485
TxD1- -Transmit RS-422, RS-485 Jumper to RxD1- for RS-485
RxD1+ +Receive RS-422, RS-485 Jumper to TxD1+ for RS-485
RxD1- -Receive RS-422, RS-485 Jumper to TxD1- for RS-485
+5V 5 volts DC 100 mA nominal current
Figure 2-32: COM1 Port Signals
30205319 | 04 | 08/2016 METTLER TOLEDO IND570 Weighing Terminal Installation Manual 2-21