Mettler Toledo IND231 Manuel D'installation page 23

to change scale parameters in an approved terminal. Refer to the Entering Setup Mode and Scale |
Type Approval sections in Chapter 3, Configuration, for more details.
2.4.4. AC Power Connection
Figure 2-17 shows an AC Power board without its protective cover.
An external power cord with a standard power socket (IEC320 C14) is supplied for the IND231.
A permanently attached line cord supplies AC power to the AC version of the IND236 terminal. The
ground wire has a loop terminal for connection to the ground connection inside the terminal (Figure
2-18).
In the IND236, an interface PCB transfers power from the line cord to the power board (Figure
2-18).
The terminal requires 100 to 240 VAC (at 176 mA maximum) with a line frequency of 50/60 Hz of
power. It is internally fused at 3.15 amps, 250 volts.
The integrity of the power ground for equipment is important for both safety and dependable
operation of the terminal and its associated scale base. A poor ground can result in an unsafe
condition should an electrical short develop in the equipment. A good ground connection minimizes
extraneous electrical noise pulses. The IND231/IND236 should not share power lines with noise-
generating equipment. To confirm ground integrity, use a commercial branch circuit analyzer. If
adverse power conditions exist, a dedicated power circuit or power line conditioner might be
required.
30094756 | 04 | 02/2021
AC Lines input
The power outlet must be installed near the equipment, and must be easily accessible.
Connection board
Figure 2-18: IND236 AC Power Connection Board and Grounding
Figure 2-17: Power Board
METTLER TOLEDO IND231/IND236 Installation Manual
DC lines output
Power cord ground
wire connected to
grounding point
Power board
(protective cover
removed)
2-9