e
e
N
N
o
o
d
d
3
3
-
-
D
D
D
D
i
i
g
g
i
i
t
t
a
a
l
l
d
d
o
o
s
s
i
i
n
n
g
g
c
c
o
o
n
n
t
t
r
r
o
o
l
l
l
l
e
e
r
r
e
Nod3-
D
: User’s instructions
165 752-A
5/23
1.2 General characteristics :
Power supply
power supply voltage
10 ..... 28
V
DC
max consumption
70 with 350
Ω
load cell
120 with 80
Ω
load cell
mA
Temperature range
storage temperature
-25...+85
°C
operating temperature
-10...+40
°C
Load cell
impedance (complete bridge)
>
80
Ω
connection
4 or 6 wires
load cell power supply
5 ± 5%
V
DC
Communication
RS 485/422 and RS232
Half or full-duplex
RS baud rate
9600 ... 115200
bauds
Can 2.0A
20....1000
kbauds
Logical inputs
number
2
type
optocoupler
low-level voltage
0 ..... 3
V
DC
high-level voltage
9 .... 28
V
DC
current at high level
10mA @ 24V
mA
insulation voltage
2500
V
rms
Logical outputs
number
4
type
opto-insulated static relays
max current @ 40°C
0.4
A
max voltage in open state
55
V
resistance in ON state
2
Ω
insulation voltage
2500
V
rms
Metrological characteristics
analog input signal range
7.8 ... 500
mV/V
typical temperature offset drift
@ input signal range <7,8 mV/V
1.5
ppm/°C
typical slope temperature effect
2
ppm/°C
max linearity error
0.003
%
A/D conversion rate
1920 .... 6.25
meas./s
Programmable functions
acquisition of zero, taring, zero tracking
physical or theoretical calibration
slope correction
non-linearity polynomial correction
low-pass, band-stop and self-adaptive digital filters
set points (up to 4) management
dosing (by filling or by unloading) processes control