semaphore TBOX LT2-530 Series, User Manual, Page: 18 / 197

Version : 1.09 18
3. Installation of the TBox-LT2
3.1. Installation of the Rack on a DIN rail
TB
OX
LT2
is mounted on a mini rack equipped with one spring for DIN rail fixing.
To fix it on a DIN rail:
1. Make sure the
TB
OX
LT2
is with its upper side on top
2. Place the spring of the Rack under the bottom side of the DIN rail and pull-up the
TB
OX
LT2
3. Push the
TB
OX
LT2
against the DIN rail
3.2. Installation on a wall
The rack can be ordered with perpendicular brackets for wall fixing. The accessory ACC-WALLKIT can be
ordered for an existing rack.
3.3. Earthconnection
Each Rack is equipped with a “Safety Earth Ground”
PIDG ring tongue terminal. It is marked with the
famous upside-down Christmas tree in a circle.
You have to crimp this ring tongue to a cable and screw this ring to the rack as indicated. On the other
side, you must connect the cable to the ground.
The cable must be a 2.5mm², coloured green/yellow (ratio ±70% / 30%).
Be sure all connections and joints are reliably made and that Safety Earth Ground connections have no
other function that connection to ground.
1. Be aware that RS485 of TBox is not isolated. If connecting several devices together, be
sure they use the same ground connection; otherwise, you have to use ACC-RS485
(contact your local TBox distributor)
2. If the environment is very noisy, like for instance with the presence of a frequency
variator, make sure :
- the connection to earth stake is as short as possible
- to separate the connection of TBox to ground from other devices
- not to mix AC cabling with low voltage DC cabling