18  CoriolisMaster FCB400, FCH400 CORIOLIS MASS FLOWMETER  |  CI/FCB400/FCH400-EN REV. H   
 
 
 
… 2  Use in potentially explosive atmospheres 
… Electrical data 
 
Zone 2, 21 and Division 2 – Model: FCx4xx-A2, FCx4xx-F2 
 
Outputs on basic device  Operating values (general) Type of protection – ‘nA’ / ‘NI’
  U
N
I
N
U
N
I
N
Current / HART output 31 / U
CO
, active 
Terminals 31 / U
CO
 
30 V 30 mA 30 V
30 mA
Current / HART output 31 / 32, passive 
Terminals 31 / 32 
30 V 30 mA 30 V
30 mA
Digital output 41 / 42, active* 
Terminals 41 / 42 and V1 / V2* 
30 V 30 mA 30 V
30 mA
Digital output 41 / 42, active** 
Terminals 41 / 42 and U
CO
 / 32** 
30 V 30 mA 30 V
30 mA
Digital output 41 / 42, passive 
Terminals 41 / 42 
30 V 25 mA 30 V
25 mA
Digital output 51 / 52, active* 
Terminals 51 / 52 and V1 / V2* 
30 V 30 mA 30 V
30 mA
Digital output 51 / 52, passive 
Terminals 51 / 52 
30 V 30 mA 30 V
30 mA
All outputs are electrically isolated from each other and from the power supply. 
Digital outputs 41 / 42 and 51 / 52 are not electrically isolated from each other. Terminals 42 / 52 have the same potential. 
*  Only in conjunction with additional ‘24 V DC loop power supply (blue)’ plug-in card in slot OC1. 
**  Only in conjunction with current output U
CO
 / 32 in ‘Powermode’, see Current output Uco / 32 as loop power supply for digital output 41 / 42 or 51 / 52 on 
page 49.