Mettler Toledo IND780 Manual De Instalación página 54

IND780 Installation Manual
The total maximum cable length from the last junction box to the IND780 terminal
depends on the power supply level, number of cells and cable gauge sizes. Refer
to Table 2-5 for the recommended maximum cable lengths supported by the
IND780 POWERCELL option board using its internal 12VDC supply. These values
are for non-hazardous area applications only.
Number of
CMOS/MTX Cells
If an external 24VDC power supply is used, up to 24 load cells per terminal with
the maximum cable length of 900 feet is possible.
PDX Connections
TO AVOID DAMAGE TO THE PCB OR LOAD CELL, REMOVE POWER FROM THE IND780
TERMINAL AND WAIT AT LEAST 30 SECONDS BEFORE CONNECTING OR DISCONNECTING
ANY HARNESS.
The PDX option board should be placed in slot 1 or slot 2 on the main board. The
PDX option is used with Mettler Toledo POWERCELL
large tank and vehicle weighing applications. Figure 2-41 shows a PDX option
board. Only one PDX option board can be installed in the terminal, to support up to
four scales.
2-26
Table 2-5: Recommended Maximum Cable Lengths
20 Gauge
(meters/feet)
4 274/900
6 213/700
8 152/500
10 121/400
12 106/350
14 91/300
THE POWERCELL PDX SCALE INTERFACE BOARD #64064718 (KIT
NUMBER 64067252) MUST NOT BE USED IN AN IND780 TERMINAL
INSTALLED IN AN AREA CLASSIFIED AS DIVISION 2 OR ZONE 2/22.
FAILURE TO COMPLY WITH THIS WARNING COULD RESULT IN BODILY
HARM AND/OR PROPERTY DAMAGE.
Number of RAAD
Boxes (350Ω cells)
1
2
3
WARNING!
WARNING!
® ®
PDX load cells used in
20 Gauge
(meters/feet)
274/900
137/450
91/300