鈥?/div>
9
420TW HL-A
420TW HL-E
420TW HL-F
420TW HL-G
420TW TC-J
420TW RTD-J
PRICE
INFORMATION
AND ORDERING
Wiring diagram
v
v
v
4-20mA
0-10V
T/C
24V
v
4-20mA
Description
The 420TW series of isolating terminal blocks can replace standard DIN-rail
terminals to provide input isolation and signal conversion.
The units are powered from the output side, making them ideal for PLC and data
acquisition applications.
Inputs available include thermocouple, RTD, current and voltage and the standard
output is 4-20mA.
For thermocouple inputs, internal rotary switches allow the user to select virtually
any type of thermocouple and the temperature range required.
A typical wiring arrangement is shown opposite.
The device is housed in an ultra-compact DIN-rail mounted enclosure only
18mm wide.
Input types
The 420TW device can accept J, K, T, R, S, E and N type thermocouples. The RTD
input accepts a PT100 2 wire sensor.
v
Dimensions and connections
63mm
v
18mm
58mm
Specifications
Parameter
Supply voltage
Input current
Full scale volt drop
Input impedance (volt in)
Input impedance (mA in)
Output linearity error
Temp coefficient
Load resistance error
Time constant (10-90%)
Operating ambient
Relative humidity
Isolation voltage
Surge voltage
Notes
Min
11V
0mA
Typ
24V
0-20mA
0.2V
1M鈩?/div>
10鈩?/div>
鹵0.1%
Max
32V
29mA
0.3V
Comments
Powered from output side
On input side (20mA input)
Voltage input
mA input
100ppm/藲C
鹵5ppm/鈩?/div>
30ms
-15藲C
0%
1kV
70藲C
90%
0<R
L
<600鈩?/div>
300ms for thermocouple input
2.5kV for 50碌S
Transient of 10kV/碌S
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur
Device is protected against reverse polarity connection
Accuracy figures based on 0-20mA input, 250鈩?load resistance, and an ambient temperature of 20藲C
v
v
v
v
1 2
1.
2.
3.
4.
Output Ch +ve
Output Ch -ve
Input Ch +ve
Input Ch -ve
3 4
1
