Mettler Toledo IND246 Guia De Instalacion página 38

The IND246 terminal is designed to support both 2mV/V and 3mV/V load cells from the same
circuitry. A load cell output rating selection jumper is not required.
Figure 2-22 shows the terminal definitions for the analog load cell terminal strip. Note that when
using four-wire load cells, jumpers must be placed between the +Excitation and +Sense terminals
and between the −Excitation and −Sense terminals.
2.4.3.3. COM1 Serial Port Connections (Analog)
The COM1 port for the IND246 analog version provides an RS-232 connection for external serial
devices. Figure 2-23 indicates which terminal carries which signal on the COM1 port. Make the
connections as necessary.
2-16 METTLER TOLEDO IND246 and IND246 POWERCELL Installation Manual
TSR (Ohms)
35 (10-350 Ω cells
Note for the standard four-wire cable: If an increase in load results in a decrease in weight
display, reverse the signal wires (+SIG and −SIG).
24 Gauge 20 Gauge
(meters/feet) (meters/feet)
24/80 60/200
Figure 2-22: Load Cell Termination
Terminal Signal
TxD Transmit RS-232
RxD Receive RS-232
Gnd Logic Ground
Figure 2-23: COM1 Port Signals
16 Gauge
(meters/feet)
120/400
64084463 | 03 | 12/2017