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زنربریر مدل Z787 F

معرفی محصول

زنربریر مدل Z787 F دو کاناله میباشد ولتاژ تغذیه 27VDC و 10mA
نوع سیگنال آنالوگ حداکثر ولتاژ 250v حداکثر آمپر 93mA در مناطق ضد انفجار مورد استفاده قرار میگیرد

توضیحات محصول


Feature
2Channel
DC version, positive polarity
Working voltage 26 5 V at 10 μA
Series resistance max 341 Ω
Fuse rating 50mA
DIN rail mounting
Replaceable back up fuse
With diode return

Function
The Zener Barrier prevents the transfer of unacceptably high
energy from the safe area into the hazardous area
The zener diodes in the Zener Barrier are connected in the
reverse direction The breakdown voltage of the diodes is not
exceeded in normal operation If this voltage is exceeded, due
to a fault in the safe area, the diodes start to conduct, causing
the fuse to blow The Zener Barrier has a positive polarity, i e
the anodes of the zener diodes are grounded
Additionally this Zener Barrier is equipped with a replaceable
fuse
The Zener Barrier is for evaluation of signals from the
hazardous area The diodes of diode return prevent a current
into the hazardous area, therefore the current assumption for
intrinsic safety calculations is zero
Depending on the application, increased or decreased
intrinsic safety parameters apply for serial or parallel
connection For the detailed parameters refer to the Zener
Barrier certificate Application examples can be found in the
system description of the Zener Barriers

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