Fluidwell E018 - Page 49

E018-P
FW_E018-P_M_v0302-02_EN Page 49
When the output is disabled, the current is by default limited to 2mA. Max. driving capacity
1000Ohm @ 27VDC. If only powered by the loop, the backlight will not be activated.
The total loop resistance may not exceed 1000 Ohm and may not be less than 330 Ohm (at 30mA).
This means that the total resistance of other loop-devices may not exceed 670Ohm.
A1
A2
+
10-27V DC
mA
mA
MEM
Fig.38: Terminals A1-A2: Analog output
Terminals A1-A2: HART Communication – Type CR
The E018-P is suitable for connecting a HART master device. This HART master device is
connected to Terminal A1 or Terminal A2 to enable HART communication with the unit.
Optionally, a HART communicator can be connected in the loop as well, provided that a suitable
resistance is inserted in the loop.
A1
A2
+
10-27V DC
mA
MEM
A1
A2 10-27V DC
MEM
MASTER
Fig.39: Terminals A1-A2: Isolated 4-20 mA analog output with HART devices