KROHNE OPTIMASS / 400 - Page 37

ELECTRICAL CONNECTIONS 3
37
OPTIMASS / 400
www.krohne.com10/2022 - 4003491806- AD OPTIMASS 400 Atex R06 en
The output connections to the mass flow sensor have the values shown in the table below. No
further intrinsic safety evaluation is required if: a) cable length provided by manufacturer is not
exceeded, or b) it is within maximum limits. See section on cable parameters.
Maximum converter values
VE53 type converters
Driver circuit, intrinsically safe. Type of protection intrinsic safety: Ex ia IIC
Terminals PCB Board Maximum values
DR+, DR- U
o
11.8 V
I
o
1325 mA
P
o
0.53 W
C
o
500 nF
L
o
36 µH
Sensor circuit, intrinsically safe. Type of protection intrinsic safety: Ex ia IIC
Terminals PCB Board Maximum values
SA+, SA-, SB+, SB- U
o
11.8 V
I
o
13 mA
P
o
39 mW
C
o
90 nF
L
o
100 mH
Linear characteristic
RTD / DMS circuit, intrinsically safe. Type of protection intrinsic safety: Ex ia IIC
Terminals PCB Board Maximum values
T1, T2, T3, T4 U
o
11.8 V
I
o
9 mA
P
o
27 mW
C
o
310 nF
L
o
1 mH
Linear characteristic
VE54 type converters
Driver circuit, intrinsically safe. Type of protection intrinsic safety: Ex ia IIC
Terminals PCB Board Maximum values
DR+, DR- U
o
11.8 V
I
o
1325 mA
P
o
0.53 W
C
o
1000 nF
L
o
36 µH