Tokyo Keiki KRG-10, User Manual

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3-4
<Hazardous area>
<Non-hazardous area>
＋
－
KRG-10
Intrinsic
safety
barrier
Power
supply
(2) Ex ia connection example.
Operating voltage: 12 to 30V DC
Output signal: 4 to 20mA DC
Electrical parameters for the entity concept
Ui=30V
Ii=93mA
Pi=0.7W
Ci
≈
0
Li
≈
0
Fig. 3.1.5 Ex ia connection example.
NOTE:
･
Select appropriate ATEX / IECEx classified product to satisfy the Ex requirement.
･
Grounding must be connected.
･
Do not open either of lids, while the power is supplied or in the explosive gas and dust atmosphere.
･
Do not make static electricity.
･
Do not use paint thinner or other chemical products. Wipe away any dirt with a soft cloth.
･
Do not modify any of structure.
･
Following requirements must be kept in accordance with ATEX / IECEx regulation.
Ambient temperature -40 to 60°C
Process temperature Please refer to the “Safety Instructions”.
･
Intrinsic safety barrier must satisfy the rating of electrical parameters for the entity concept.
･
Cable inductance (=Lw) and capacitance (=Cw) should be chosen so as to lower the rating of
Intrinsic safety barrier allowable inductance (=Lo) and capacitance (=Lo).
･
Perform grounding structure.
CAUTION
Ensure the requirement of wiring with Ex product must be satisfied.