Siemens sitrans LR 400 Guide Rapide page 7

SITRANS LR 400 Wiring Requirements
• All field wiring must have insulation suitable for the applied input voltage.
• 4-20 mA, PROFIBUS PA, DC input circuits, 14-20 AWG, shielded copper wire
• AC input circuit, minimum 14 AWG copper wire
• Recommended torque on terminal clamping screws, 0.5-0.6 Nm
• The 24 V DC version must only be connected to SELV or PELV circuits.
SITRANS LR 400 Wiring
AC
HART Wiring
cable clamp
4 5
3 6 7 8
Rated tem perature of
connection ca bles m us t
m A
exceed m ax im u m am bie nt
tem p erature by at least 15 K
DC
HART Wiring
cable clamp
3 4 5 6 7 8
Rated tem pera ture of
connection cables m ust
m A
exceed m axim um am b ient
tem perature by at le ast 15 K
7ML19985QN83
earth
terminal
1 2
L L
1 2
N
earth
terminal
1 2
19-3 0 V
SITRANS LR 400 – QUICK START MANUAL
PROFIBUS Wiring
cable clamp
3 4 5 6 7 8
Rated tem p erature of
co n nectio n cables m ust
P RO FI-
exce ed m a xim um am b ien t
BU S PA
tem p e ratu re by at leas t 15 K
PROFIBUS Wiring
cable clamp
3 4 5 6 7 8
Rated te m perature o f
connection cables m ust
PRO FI-
exceed m axim um am bient
BU S PA
tem pera ture by at leas t 15 K
earth
terminal
1 2
L L
1 2
N
earth
terminal
1 2
19-3 0 V
Page EN-5