Hitachi EHV+ Series User Manual

Chapter 2 Specifications
2 – 65
Specification
EH-PT4
Applicable resistance thermometer
Platinum resistance thermometer Pt100 (JIS C 1604-1989) / Pt1000
Temperature conversion data
Signed 15 bits
-20 to 40°C
(Pt100)
±0.1°C @25°C (±0.5°C @0 to 55°C)
-50 to 400°C
(Pt100)
±0.6°C @25°C (±3°C @0 to 55°C)
Accuracy *1
-50 to 400
°C
(Pt1000)
±0.8°C @25°C (±6°C @0 to 55°C)
Measuring temperature range
-20 to 40
°C / -50 to 400°C (2mA constant current system)
Number of Input channels
4
Conversion time
Approx. 1s/4 channels
Channel and Internal circuit Photo-coupler insulation
Insulation system
Between channels No insulation
External connection
Removable type screw terminal block (M3)
External power supply
24V DC
External wiring
Shield cable
Unused terminal processing
Temperature conversion data is H7FFF
External wiring resistance
Total resistance of 4 channels 400
Ω at the maximum
Additional function
Linearization
Error detection *2
Data is H7FFF if measured value exceeds -51
°C or 410°C
Wire breakage processing
Temperature conversion data is H7FFF
Internal current consumption
160mA maximum
*1 The accuracy indicates the value of 10 minutes after power up. The value may become slightly higher immediately after
power up. Also check the resistance thermometer in advance because small error could exist in RTD.
*2 If Ax or Bx cable is open, data will be H7FFF. If bx cable is open, data will be undefined value.
Terminal configuration No. Signal
name
Diagram of Internal circuit
[1] b0
[2] B0
[3] b1
[4] B1
[5] b2
[6] B2
[7] b3
[8] B3
[9] 24V DC+
[10] A0
[11] N.C.
[12] A1
[13] N.C.
[14] A2
[15] N.C.
[16] A3
[17] N.C.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
Screw fo
r
fixing
[18] 24V DC-
A0
A3
B0
b
0
RTD
RTD
B3
b
3
24 V DC +
24 V DC -
Internal circui
t
-
+
-
+

Hitachi EHV+ Series Specifications

General

Brand	Hitachi
Model	EHV+ Series
Category	Controller
Language	English