Hardware manual

LT-4201TM/4301TM Hardware Manual
131
Analog Inputs and Analog Outputs
Analog Input Characteristics
The table describes the characteristics of the analog inputs:
Characteristic Voltage input Current input
Number of maximum input 2
Input type Single-ended
Input range -10... 10 Vdc/0...10 Vdc 0...20 mA/4...20 mA
Input impedance 1 MΩ or more 250 ± 0.11% Ω
Sample dura
tion time 10 ms per channel + 1 scan time
Total input system transfer time 20 ms + 1 scan time
Input tolerance Maximum deviation
at 25°C (77°F)
without
electromagnetic
disturbance
± 1% of the full scale
Maximum deviation ± 2.5% of the full scale
Digital resolution 13 bits
Temperature drift ± 0.06% of the full scale
Common mode characteristics 80 db
Cross talk 60 db
Non-linearity ± 0.4% of full scale
Input value of LSB 5 mV 10 µΑ
Maximum allowed overload (no
damage
s)
± 30 Vdc (
less than
5 minutes)
± 15 Vdc (No damage)
± 30 mA dc
Protection type Photo coupler between input and internal circuit
Cable Type Shielded
Length Must be less than 3 m for IEC61131-2
confor
mance. Maximum transmission distance is
10 m.
Te
rminal blocks Type: 3.5 mm (0.137 in.) pitch
Terminal blocks are removable
Isolation External input: Photo-coupler isolation
Between channels: Non-isolated