Mettler Toledo IND256x Guide D'installation page 33

Variant with non-intrinsically safe DC-supply
(Type key ends with "56" or "54") (only
ATEX & IECEx approved)
Variants with intrinsically safe (battery) DC-
supply (Type key ends with "25" or "27")
2.9.2. Intrinsically Safe RS232 Interface
Terminals J1.1 (TXD), J1.2(RXD) – J1.3
(GND)
Intrinsically Safe Output for Connection to a Load Cell
2.9.3.
Intrinsically safe output for connection to a
Terminals J5.1 (EXC+), J5.2 (SEN+), J5.3
(SIG+), J5.5 (SIG-), J5.6 (SEN-), J5.7
(EXC-)
30491430 | 02 | 11/2019
Supply circuit
Permanently connected cable with ferrule:
Blue: +24V, Brown: gnd, Green-yellow:
PE
Connection terminals: V+, GND, BATT,
DATA
Intrinsically safe RS232-interface
load cell
METTLER TOLEDO IND256x Weighing Terminal Installation Manual
Parameters
Rated voltage: DC 18...30 V
Rated current: 250 mA
Maximum input voltage on associated apparatus:
Um AC 250 V
(Note: the rated voltage is lower)
Nominal input voltage: DC 10 V
Nominal input current: 350 mA
Maximum input voltage: Ui DC 12.8 V
Maximum input current: Ii 3.03 A
Maximum input power: Pi 6.83 W
Effective internal inductance:
Effective internal capacitance:
Parameters
Maximum input voltage:
Effective internal capacitance:
Effective internal inductance:
Maximum output voltage:
J1.1-GND resp. J1.2-GND each:
Maximum output current:
J1.1-GND resp. J1.2-GND each:
Maximum output power:
J1.1-GND resp. J1.2-GND each:
Maximum external capacitance:
Maximum external inductance:
Parameters
Maximum output voltage:
Maximum output current:
Maximum output power:
Maximum external capacitance: Co 6.8 µF
Maximum external inductance:
Li negligible
Ci negligible
Ui DC ±10 V
Ci negligible
Li negligible
Uo DC
±5.36 V
Io
±12.9 mA
Po
17.2 mW
Co 100 nF
Lo 100 µH
Uo DC 5.88 V
Io 171 mA
Po 940 mW
Lo 0.3 mH
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