semaphore TBOX LT2-530 Series, User Manual, Page: 166 / 197

Version : 1.09 166
20. Cabling
20.1. Power Supply
Connector: Spring Cage Terminal block
(see chapter 3.4)
A power supply of minimum 20 VDC is required to charge the external 12 V backup battery.
When the voltage at Vin disappears, the 12 V backup battery powers
TB
OX
LT2 down to 10 V.
Below 10 V, the external backup battery is automatically disconnected and TB
OX
LT2 will
restart when applying voltage at Vin.
The Gnd connection should be used only for power supply. DON'T USE IT TO CABLE Analog
Inputs (see Appendix H)
20.2. RS232 (standard)
Connector: Spring Cage Terminal block
(see chapter 3.4)
As an alternative, you can use a standard serial cable, cut one of the ends and cable directly to
the
TB
OX
LT2 connector.
PS & RS Connector
Backup
Battery
+8.. +30 VDC
0 VDC
Vin
Gnd
Bat
Gnd
CTS - 8
RTS - 7
Gnd - 5 Gnd
Tx - 3
Rx
DB9 Female
to PC
Tx
Rx - 2