Power & Signal Wiring - Emerson DIXELL MRLDS-450 Installing And Operating Instructions

3.4.2 Power & Signal Wiring
1. Locate the relevant connections (Power, Analog, Modbus) and remove the terminal block
from the PCBA. (The PCB terminal blocks are pluggable type and may be removed to aid
termination.)
Connection
Power
Digital Output
Analog Output
2. Remove plugs from the corresponding M16 cable glands.
•
The product comes with cable glands and plugs pre-installed. (The power entry
cable gland is shipped from the factory without a plug.)
3. Using the appropriate cable glands, insert wires into the enclosure.
4. Secure the wires in each terminal block and, pressing firmly, reinstall the terminal block
into the PCBA.
•
Polarity must not be reversed.
•
For 24 VAC installations in a daisy-chain configuration, the neutral polarity must
be maintained for all instruments.
5. Remove all excess cable from the housing before securing the cable glands.
1592018550 MRLDS-450 GB r.1.2 29.05.2020
Description
24V IN: -
24 VDC/VAC IN
24V IN: +
24 VDC/VAC OUT
24V OUT: -
(power daisy chain
terminal)
24V OUT: +
MODBUS: B
MODBUS: A
Modbus Network
Communications
MODBUS: GND
MODBUS: SH
ANALOG: -
Voltage or Current
Output
ANALOG: +
MRLDS-450
Label Wiring Termination
24 VDC/VAC neutral /
ground
24 VDC positive / VAC live
24 VDC/VAC neutral /
ground
24 VDC positive / VAC live
RS-485 "B" (inverted)
RS-485 "A" (non-inverted)
RS-485 GND
RS-485 Shield
Analog output ground
Analog output signal (+)
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