Cable Specification, Connecting Cable; Connecting The Measuring Unit; Transmitter Connection - Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual

Proline Promass 84 MODBUS RS485
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Endress+Hauser
4.2.2

Cable specification, connecting cable

The specifications of the cable connecting the transmitter and the sensor of the remote version are
as follows:
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• 6 x 0.38 mm PVC cable with common shield and individually shielded cores
• Conductor resistance: ≤ 50 Ω/km
• Capacitance core/shield: ≤ 420 pF/m
• Cable length: max. 20 m (65 ft)
• Permanent operating temperature: max. +105 °C (+221 °F)
Note!
The cable must be installed securely, to prevent movement.
4.3

Connecting the measuring unit

4.3.1

Transmitter connection

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 earth to the ground terminal on the housing before
the power supply is applied (not required for galvanically isolated power supply).
• Compare the specifications on the nameplate with the local supply voltage and frequency.
The national regulations governing the installation of electrical equipment also apply.
1. Unscrew the connection compartment cover (f) from the transmitter housing.
2. Feed the power supply cable (a) and the signal cable (b) through the appropriate cable entry.
3. Perform wiring:
– Wiring diagram (aluminum housing) → å 18
– Wiring diagram (stainless steel housing) → å 19
– Wiring diagram (wall-mount housing) → å 20
– Terminal assignment → ä 24
4. Screw the cover of the connection compartment (f) back onto the transmitter housing.
b
a
Fig. 18: Connecting the transmitter (aluminum field housing). Cable cross-section: max. 2.5 mm
a Cable for power supply: 85 to 260 V AC, 20 to 55 V AC, 16 to 62 V DC
Terminal No. 1: L1 for AC, L+ for DC
Terminal No. 2: N for AC, L- for DC
Signal cable: Terminals Nos. 20-27 → ä 24
b
c Ground terminal for protective ground
d Ground terminal for signal cable shield
e Service adapter for connecting service interface FXA193 with Proline Adapter Cable (Fieldcheck, FieldCare)
f Cover of the connection compartment
g Securing clamp
f
– 27
+ 26
– 25
e
+ 24
– 23
+ 22
– 21
+ 20
N (L-) 2
L1 (L+) 1
g
Wiring
b
d
c
a
a0004582
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