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Hitachi EH-150 Series Instruction Manual

Resistance temperature detective input module, programmable logic controller.
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EH-150 series PLC
EH-RTD8
Resistance Temperature Detective
input module
Instruction manual
Thank you for purchasing a Hitachi Programmable Logic
Controller. To operate it safely, please read this instruction
manual and all the user manuals carefully. Please be sure to
use the latest versions of user manuals and keep them at hand
of end users for future reference.
Caution
1. All rights reserved.
2. The content of this manual may be changed without notice.
3. While efforts have been made on this manual to be
accurate, please contact us if any mistake or unclear part is
found.
Warranty period and coverage
The warranty period is within 18 months after manufacturing
date (MFG NO.) or 12 months after installation.
Examination and repair within the warranty period is covered.
However within the warranty period, the warranty will be
void if the fault is due to;
(1) Incorrect use from instructed in this manual and the
application manual.
(2) Malfunction or failure of external other devices than
this unit.
(3) Attempted repair by unauthorized personnel.
(4) Natural disasters.
The warranty is for the PLC only, any damage caused to third
party equipment by malfunction of the PLC is not covered by
the warranty.
Repair
Any examination or repair after the warranty period is not
covered. And within the warranty period any repair and
examination which results in information showing the fault
was caused by any of the items mentioned above, the repair
and examination cost are not covered. If you have any
questions regarding the warranty or repair cost, please contact
your supplier or the local Hitachi Distributor. (Depending on
failure part, repair might be impossible.)
Ordering spare parts and inquiries
Please contact your local suppliers for ordering products/spare
parts or any inquiries with providing the following
information.
(1) Product name
(2) Manufacturing number (MFG NO.)
(3) Details of failure
HIT ACHI
Safety precautions
Definitions and Symbols
Indicates a potentially hazardous situation
!
which, if not avoided, can result in serious
DANGER
injury or death.
Indicates a potentially hazardous situation
which, if not avoided, can result in minor
!
CAUTION
to moderate injury, or serious damage of
product.
: Indicates Prohibition
!
: Indicates Compulsion
!
- Do not touch terminals while power ON. There is a danger of
electric shock and/or injury.
- Be sure to install external safety devices outside of the PLC
like emergency stop circuit or interlock circuit.
!
- Be sure that the rated voltage matches the power supply
voltage of the unit. Otherwise, there is a danger of breakdown
and/or injury and/or fire.
- Only qualified personnel shall carry out wiring work.
Otherwise, there is a danger of breakdown and/or injury and/or
fire.
- Be sure to ground the unit. Otherwise, there is a danger of
electric shock and/or malfunction.
- Do not attempt to modify nor disassemble the unit. There is a
danger of breakdown and/or injury and/or fire.
Mounting
- Mount the PLC on a metal plate and install in a cabinet as
follows.
- Be sure to ground the cabinet and the metal plate, otherwise
there is a risk of malfunction.
- Install the PLC as described in user manual.
- Take appropriate measures when the PLC system installed in
locations:
Influenced easily due to noise or static electricity or other
forms of noise.
Under strong electromagnetic field.
Close to power supplies.
- Be sure to tighten mounting screws, terminal screws and
connector screws.
- Be sure to check that devices with lock mechanism, such as an
expansion cable or terminal blocks, are locked properly.
1
DANGER
CAUTION
COMPULSION
PROHIBITION
NJI-613 (X)

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Table of Contents

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   Summary of Contents for Hitachi EH-150 Series

  • Page 1 - Be sure to ground the cabinet and the metal plate, otherwise questions regarding the warranty or repair cost, please contact there is a risk of malfunction. your supplier or the local Hitachi Distributor. (Depending on - Install the PLC as described in user manual. failure part, repair might be impossible.)
  • Page 2 I/O Wiring Enclosure - Be sure that the input/output matches the specified voltage. Metal plate Basic Unit Otherwise, there is a danger of breakdown and/or fire. - Use shielded cable for relay outputs modules, and connect shields to a functional ground for one side or both sides Grounding Expansion Unit depending on applications.
  • Page 3 Specifications General specifications Item Specifications Operating ambient temperature 0 to 55°C -10 to 75°C Storage ambient temperature Operating ambient humidity 5 to 95 % RH (no condensation) Storage ambient humidity 5 to 95 % RH (no condensation) Vibration resistance Conforms to IEC 60068-2-6 ○...
  • Page 4 Name and function of each part Name and function of each part Model name EH-RTD8 1] Lock button Weight Approx. 0.15 kg Consumption current Approx. 300 mA 5] LED display Dimensions (mm (in.)) 30 (1.18) 95 (3.74) 2] I/O cover 4] Mode setting DIP switch 3] Terminal Name...
  • Page 5 Terminal layout and internal circuit Terminal layout Internal circuit Signal name 2-wire 3-wire OK 2W AMB HS ① ② PT INPUT EH-RTD8 ③ B2・B3 B0・1 ④ ① ⑤ ⑩ ② ⑥ B6・B7 ⑪ ⑦ ③ ⑫ ⑧ ④ ⑨ ⑬ B6・7 ⑤...
  • Page 6 Conversion table ○ ○ Range Input C conversion F conversion PT4 compatible Remarks -32768 -32768 ○ Under -200 H7FFF (H8000) (H8000) ○ -200 -2000 -3280 H7FFF Measurement minimum ○ -600 -760 HF666 PT4 range minimum ○ ○ -200 to 850 H0000 ○...
  • Page 7 Caution (1) LED indication Blinking Lighting - No power supplied. Module error. Normal operation. - Module error. (Contact your local supplier.) (Contact your local supplier.) 3-wire mode. 2-wire mode. ○ ○ -200 to 850 -40 to 60 1.6s conversion time. 0.5s conversion time.

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