Electrical Specifications - Mettler Toledo IND780 Guia De Instalacion

2.7.5.6.

Electrical Specifications

Configuration
Input Modes
Voltage Range
Maximum Input Voltage
Maximum Input Current
Minimum Input Impedance
Input Specifications
Maximum Input Frequency
Min. Input Frequency for Rate
Measurement
Duty Cycle
Channel Update Time
Accuracy
Maximum Count Value
Maximum Rate Value
Fault detection
Isolation
2-48
METTLER TOLEDO IND780 Installation Guide
Specification
VIL*
VIH*
Vmax
Minimum Input Low Time
Minimum Input High Time
Accumulated Flow Data
Rate Data
Instantaneous
Average
1 Hz Averaging Mode
Instantaneous mode
Analog Filter
Input Channel to Backplane
Input Channel to Input Channel 750 VDC Continuous
• Description
2 channels of differential flow meter inputs (uni-directional) or 1 channel
of differential flow meter inputs (bi-directional); 2 open collector output
switches
AC or one of the 3 levels of DC inputs
AC (rms) DC (5V)
-50mV +1.4V
+50mV +3.4V
+/-50V +/-50V
42 VDC peak
1 A
11 KΩ
50 KHz
1 Hz
Frequency
Input Level
Max.
5 VDC 50 kHz
12 VDC 50 kHz
24 VDC 50 kHz
AC 50 kHz
8 µ sec (input filter off); 16 µ sec (input filter on)
8 µ sec (input filter off); 16 µ sec (input filter on)
≤5 msec per channel maximum
Larger of (2/FREQ) or channel update time.
2 seconds
+/- 1 Hz
+/- 1% @ 50KHz
15kHz software selectable for each channel
4,294,967,295
65,535
Configuration error.
750 VDC Continuous
DC (12V) DC (24V)
+3.0V
+9.0V +12.0V
+/-50V
Max Duty
Duty Cycle
Cycle
35 55
40 60
40 60
40 50
64057253 | 14
+4.0V
+/-50V
Min Pulse
Width
7 µsec
8 µsec
8 µsec
8 µsec
| 08/2014