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Hitachi EH-150 Series Instruction Manual page 7

Resistance temperature detective input module, programmable logic controller
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Caution
(1) LED indication
LED
OK
- No power supplied.
- Module error.
(Contact your local supplier.)
2W
3-wire mode.
AMB
-200 to 850
HS
1.6s conversion time.
0 to 7
Normal operation.
* If no sensor is connected, open-wire is detected, LED of corresponding input number is blinking. The blinking can be avoided
by short between terminals in each channel.
[Intended terminals in 3-wire input] A*, B* and b*
[Intended terminals in 2-wire input] A* and B*
(2) Wiring
Since analog signal is very sensitive, be sure to use shielded cable in order to protect from noise, and route the cable apart from
other power/signal cables.
Be sure to ground the shield at one end basically. But grounding at both ends or no grounding can be more effective depending
on system environment.
3-wire input
EH-RTD8
A0 to A5
b0 to b5
B0 to B5
Grounding at the one end
2-wire input
EH-RTD8
A0 to A7
B0 to B7
Grounding at the one end
Off
Module error.
(Contact your local supplier.)
C.
- Wire is disconnected.
- Input signal is out of the range.
Shielded
Shielded
Blinking
-
-
-
Shielded cable
(Twisted cable)
Shielded cable
(Twisted cable)
7
Lighting
Normal operation.
2-wire mode.
C.
-40 to 60
0.5s conversion time.
-
RTD
(3-wire)
RTD
(2-wire)
NJI-613 (X)

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