KROHNE H250 M8-M9-M10 EN - Manual (Page 37)

ELECTRICAL CONNECTIONS
4
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H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
4.4.3 Switching outputs B1 and B2
The switching outputs are electrically isolated from each other and from the current output.
Switching outputs B1 and B2 can be electrically connected in two ways:
• NAMUR switching output - Ri approx. 1 kOhm
• OC - (open collector) low-resistance switching output with PNP technology
Switching values
CAUTION!
The switching outputs can only be operating if the power supply is applied to terminals I+ and I-.
M10 - switching outputs
1 NAMUR terminal connection
2 Isolation switching amplifier
3 PNP technology terminal connection
4 Power supply
5 Load
NC contact NO contact
NAMUR OC NAMUR OC
Switching value reached ≤1 mA ≤1 mA > 3mA max. 100 mA
Switching value not reached > 3mA max. 100 mA ≤1 mA ≤1 mA
MA_H250_R02_en_269302_PRT.book Page 37 Tuesday, April 12, 2011 10:17 AM