KROHNE H250 M40 NEPSI Ex ia - Manual (Page 14)

2
DEVICE DESCRIPTION
14
H250 M40
www.krohne.com 03/2013 - 4002616701 AD H250 M40 NEPSI Ex ia R01 en
2.8 Electrical data
Built-in equipment for the variable area flowmeter may only be connected to separate
intrinsically safe circuits with the following maximum values:
Electrical equipment Rated voltage Nominal current
Limit switch K1 / K2 8 VDC ≤1 / ≥3 mA
Signal output ESK4 14 - 30 VDC 4...20mA with HART ® communication
Switching output ESK4-T OC output 8 - 30 VDC 1...100 mA
Switching output ESK4-T NAMUR output 8 VDC ≤1 / ≥3 mA
Signal input ESK4-T input 8 - 30 VDC ≤2 mA
ESK4-FF Foundation Fieldbus
transmitter 1
9 - 30 VDC 16 mA
ESK4-PA Profibus transmitter 2 9 - 30 VDC 16 mA
1 Further information and instructions for operation of the ESK4-FF transmitter are provided in separate supplementary
instructions.
2 Further information and instructions for operation of the ESK4-PA Profibus transmitter are provided in separate sup-
plementary instructions.
Maximum values
Built-in equipment U
i
[V] Ii[mA] P
i
[mW] C
i
[nF] L
i
[μH]
ESK4 30 130 1000 ~ 0 10
ESK4-T (I/O-modul) 30 130 1000 10 ~ 0
ESK4-PA / ESK4 FF 1 24 380 5320 ~ 0 ~ 0
I7S23,5-N / SC3,5-N0-Y 16 25 64 150 150
16 52 169 150 150
SJ3,5-SN / SJ3,5-S1N 16 25 64 30 100
16 52 169 30 100
1 FISCO field device
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