Flow Meter Interface; Powercell Mtx Load Cell Interface; Incendive Inputs And Outputs - Mettler Toledo IND780 Guia De Instalacion

network while listening, and communication on the CANBus while talking. The field circuit
parameters are listed next.
V
max
C
2.2.4.

Flow Meter Interface

The Flow meter connection is rated non-incendive on the IND780 terminal by both UL and DEMKO.
The field circuit parameters are listed next.
2.2.5.

POWERCELL MTX Load Cell Interface

The POWERCELL MTX load cell interface connection is rated incendive on the IND780 terminal by both UL
and DEMKO
number 64085421). Refer to Drawing 61807794 for connections between MTX load cell network
and IND780 terminal.
2.3.

Incendive Inputs and Outputs

If a specific input or output is rated incendive, then special wiring precautions must be taken to
protect the wiring in the Division 2 or Zone 2/22 area. Refer to the electrical regulations for the
country of installation for specific wiring requirements. Note that the United States and Canada
requires installation of conduit hubs and conduit to protect incendive signals. Refer to the first part
of this chapter for details.
2-6 METTLER TOLEDO IND780 Division 2 and Zone 2/22 Installation Guide
Voc = 12.6 VDC
Listening
cULus ATEX/IECEx
= 26.8 VDC Input voltage max = 26.8 VDC
I = 4 mA
max
= 0.602 nF
i
L = 0 µH
i
. Connection to the load cell network must be made via the CMOS Barrier (Material
Power to PDX Load Cell
cULus
Voltage max = 12.6 VDC
I = 1181 mA
sc
C = 59.4 µF
a
L = 200 µH
a
CANBus Communication
cULus
V = 5.277 VDC
oc
I = 200 mA
sc
C = 1000 µF
a
L = 2 mH
a
cULus ATEX/IECEx
V = 26.8 VDC U = 26.8 VDC
max i
I = 200 mA I = 200 mA
max i
C = 0 µF C
i
L = 30 µH Li = 30 µH
i
ATEX/IECEx
Talking
ATEX/IECEx
Output voltage max = 5.277 VDC
= 0 µF
i
64063214 | 07 | 02/2018