Ac Power Connection - Mettler Toledo IND231 Manual De Instalación

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 85 to 264 VAC (at 176 mA maximum) with a line frequency of 49 to 61 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.
30094803 | 00 | 08/2013
AC Lines input
Figure 2-17: Power Board
Connection board
Figure 2-18: IND236 AC Power Connection Board and Grounding
FOR CONTINUED PROTECTION AGAINST SHOCK HAZARD CONNECT TO PROPERLY GROUNDED
OUTLET ONLY. DO NOT REMOVE THE GROUND PRONG.
METTLER TOLEDO IND231/IND236 Installation Manual
DC lines output
Power cord ground
wire connected to
grounding point
Power board
(protective cover
removed)
WARNING
2-9