Model Lwa422 Input Module (Rtd Input, 4 Channels) - Hitachi HSC-2100 Hardware Manual

2 SPECIFICATIONS OF INDIVIDUAL MODULES

2.26 Model LWA422 Input Module (RTD Input, 4 Channels)

Item
Module input
Input channels
Insulation method
Measurement temperature range
A/D bits
Conversion ratio
Overall accuracy
(room temperature)
Influence of temperature on overall
accuracy
Response time
Input filter
Internal
12 VDC
consumption
5 VDC
current
Insulation withstand voltage
Connection
Applicable
cable size
External wiring
Tightening
torque
Maximum
wiring length
Mass
Process side
Bridge output =
The overall accuracy listed above is expressed as percentages of the full scale value of this AI
module.
The response time listed above does not include the delay time of the input filter.
The lead-in wires from each RTD may be shielded either separately from or together with the
lead-in wires from the other RTDs.
This AI module can only be used with the station's number-of-points setting set to 16.
If it is set to any other value (32 to 128), the module will not function.
The module supports only the value 16.
RTD (resistance temperature detector) input
4
Photocoupler (common to four channels)
-50°C to +150°C
12 (sign bit + 11 bits)
2,000 in digital value to 125 mV
±0.6% full scale (ambient temperature from 20 to 25°C)
±0.01%/°C
30 + 5TRc ms or less (TRc: remote I/O transfer time)
30 + Rc ms or less (Rc: J.NET transfer time)
40 dB at 60 Hz; Time constant, 0.3 s
150 mA or less
40 mA or less
500 VAC, 1 minute (between external terminal and ground)
20-point terminal block connector (Connector screw type: M3)
2
0.5 to 1.25 mm
0.6 to 0.8 N·m
200 m (shielded twisted-pair cable)
360 g
A0
B0
C0
SHD
A1
B1
C1
SHD
A2
B2
C2
SHD
A3
B3
C3
SHD
GND
Cubicle ground
25 (Rxt - 100) 4r (Rxt - 100)
26 (2,500 + Rxt) 6,250,000
Specification
Internal
LWA422
circuitry
6 V
A/D
× 6 (V)
Rxt: RTD's resistance at t °C.
r: Resistance of a lead-in wire from the RTD.
2-30
LWA422 AI
A.INPUT
-50～+150℃
1
A0
2
B0
3
C0
4
SHD
5
A1
6
B1
7
C1
8
SHD
9
A2
10
B2
11
C2
12
SHD
13
A3
14
B3
15
C3
16
SHD
17
GND
18
19
20
HITACHI