Com1 Serial Port Connections - Mettler Toledo IND246 Guia De Instalacion

IND246 Terminal Installation Manual
87 (4-350 Ω cells)
43 (8-350 Ω cells)
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 2-16 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.
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).

COM1 Serial Port Connections

The COM1 port provides an RS-232 connection for external serial devices. Figure
2-17 indicates which terminal carries which signal on the COM1 port. Make the
connections as necessary.
2-12
24 Gauge
TSR (Ohms)
(meters/feet)
60/200
30/100
Figure 2-16: Load Cell Termination
Terminal
TxD
RxD
Gnd
Figure 2-17: COM1 Port Signals
20 Gauge
(meters/feet) (meters/feet)
182/600
91/300
Signal
Transmit RS-232
Receive RS-232
Logic Ground
16 Gauge
304/1000
152/500