Promass 40 4 Wiring
Endress+Hauser 17
4Wiring
Warning:
When connecting Ex-certified devices, see the notes and diagrams in the Ex-specific
supplement to this Operating Instruction. Please do not hesitate to contact your E+H
representative if you have any questions.
4.1 Connecting the measuring unit
4.1.1 Connecting the transmitter
Warning:
• Risk of electric shock. Switch off the power supply before opening the device. Do not
install or wire the device while it is connected to the power supply. Failure to comply
with this precaution can result in irreparable damage to the electronics.
• Risk of electric shock. Connect the protective conductor to the ground terminal on the
housing before the power supply is applied (not necessary if the power supply is gal-
vanically isolated).
• Compare the specifications on the nameplate with the local voltage supply and fre-
quency. The national regulations governing the installation of electrical equipment
also apply.
1. Remove the cover of the connection compartment (f) from the transmitter housing.
2. Feed the power supply cable (a) and signal cables (b) through the appropriate
cable entries.
3. Connect the cables:
– Wiring diagramm
→ Fig. 10
– Terminal assignment
→ Page 18
4. Screw the cover of the connection compartment (g) firmly onto the transmitter
housing.
Fig. 10: Connecting the transmitter (aluminium field housing); Cable cross-section: max. 2.5 mm
2
a Cable for power supply: 85...260 V AC, 20...55 V AC, 16...62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L
− for DC
b Signal cable: Terminals Nos. 20–27
→ Page 17
c Ground terminal for protective conductor
d Ground terminal for signal cable shield
e Service adapter for connecting service interface FXA 193 (FieldCheck™, FieldTool™)
f Cover of the connection compartment
g Locking clipTerminal assignment
F06-xxxxxxxx-04-06-xx-xx-005
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