18
SMARTRONIC MA
V - Electric connections
V - 1 Connection housing
To access the electric connection terminal block,
unscrew the 4 TORX s crews (T 20) in the
connection housing
Tightening torque: 2 Nm
Seals
Connection housing
V - 2 Connections to the 4- 20 mA current loop
Use a screened cable for the 4- 20 mA signal with the screening connected to the current generator earth, since the
Smartronic MA box has no earthing.
Current generator characteristics:
Minimum operating current 3.8 mA
Required load voltage 10 VDC
Load resistance: 500
to 515
under 20mA
SMARTRONIC MA unpluggable terminal block
Terminals 7 and 8: Connection of the 4 - 20 mA setpoint signal
Connection on unpluggable terminal block:
Length to be stripped: 7 mm
Cross - section of rigid or flexible conductor: 0.14mm
2
to 1.5 mm
2
Cross- section of flexible conductor with end connector without insulating entry cone: 0.25 mm
2
to 1.5 mm
2
Cross- section of flexible conductor with end connector with insulating entry cone: 0.25 mm
2
to 0.5 mm
2
