Com1 Serial Port Connection; Wiring Connections For Options - Mettler Toledo IND231 Manual De Instalación

8. Use a wire tie to secure the wires to the enclosure hinge wire.
2.4.6.

COM1 Serial Port Connection

The COM1 port (REF) provides an RS-232 connection for external serial devices. Figure 2-29 and
Table 2-5 indicate which terminal carries which signal on the COM1 port (DSUB-9) of the IND231.
In the IND236, the RS-232 connector is on the mainboard (see Figure 2-16). The communication
cable enters the enclosure through a cable gland (see Figure 2-14) and connects to the COM1 port
on mainboard.
An example of connecting via RS-232 to external equipment is shown in Figure 2-30. Make the
connections as necessary.
2.4.7.

Wiring Connections for Options

Options for the IND231/IND236 that require external connections include the following:
•
•
•
2-16 METTLER TOLEDO IND231/IND236 Installation Manual
Terminal
Pin 2
Pin 3
Pin 5
Figure 2-30: IND236 Sample COM1 Connection
COM2 with isolated RS-232/422/485
USB Interface
Discrete I/O interface
Figure 2-29: IND231 COM1 Port
Table 2-5: IND231 COM1 Port Signals
Signal
RxD RS-232 Receive
TxD RS-232 Transmit
Gnd Logic Ground
1. MAXIMUM CABLE LENGTH: 50 FEET (15 METERS).
2. WIRE SIZE: 18 AWG (.823 mm
24 AWG (0.205 mm
NOTES:
2
) MAXIMUM
2
) MINIMUM.
30094803 | 00 | 08/2013