Unigas HTLX 1025.1 Installation Manual page 54

1.3.1 Recommendations
It is recommended to use a metal "mounting plate" for the LMV5 Base Unit and the Transformer AGG5.220.
Use this plate to provide the Functional Earth (FE), see also /EARTH connection example
The connection of the FE to the LMV5 has to be made by connecting the X52.4 terminal with FE!
Follow exactly the shield and earth connection in the wiring diagram
In some cases connecting the terminal X52.2 with FE results in an improved EMC- immunity of the LMV5. Make this connection and check the
result, if there is no improvement, remove this connection.
The FE is wired LMV- internal to the terminals for the shields (e.g. for Temperature- & Pressure- Sensors, ...), see "4. Shielding"
To have a good connection of FE to the actuators SQM4/9, make certain that there is a proper electrical contact between the housing of the
actuators and FE.
If necessary connect the actuators SQM45/48/91 with a separate cable with the maximum possible diameter to FE, see also Appendix "Example for
wiring, earthing and shielding the LMV5-System"
1.3.2 Shielding
The LMV5-FE-terminals for the shields are LMV5 internally connected with X52.4, this terminal must be connect external with FE!, see also "3.3 ".
The shield terminals for the CAN-Bus (X50.1, X51.1) are connected direct with X52.4, the other shied terminals are connected via capacitors to
prevent DC- current.
For the cables listed below use shielded cables:
For the CAN-Bus cable use AGG5.631 and/or AGG5.641 together with AGG5.110 = CAN bus connection shield, for connecting the CAN bus to the
basic unit. More details see page 36 "Installation Guide CC1J7550.1"
•
Cables for the VSD:
•
Line voltage cable VSD - Fan motor
•
Low voltage cable LMV5 – VSD (terminals X73)
•
Cables for Temperature or Pressure sensors, set points, load output at the LMV5 Base Unit: X60, X61, X62, X63
•
Cables for the Fuel Counters at the LMV5 Bas Unit: X71, X72
•
Cable for the Speed sensor: X70
•
Cable for the QGO20 sensor at the PLL52: X81
•
Cables for Temperature sensors at PLL52: X86, X87
(only if present) Cable for QRA7- Signal wires no. 3, 4 and 5, for cable length > 10m and < 100m; consider reinforced insulation to signal cable and
connect it to PE at the cabinet PE- rail.
FE
FE
"LMV5 connection to
FE and internal
wiring"
6