semaphore TBOX LT2-530 Series, User Manual, Page: 163 / 197

Version : 1.09 163
19.7. I/O
Group 1 – Internal I/O
DI: Power Failure Digital Input returning a failure of Power at Vin, when
TB
OX
LT2
is equipped
with an external 12V Backup battery.
AI: Power Supply Voltage Voltage at Vin connection
AI: External 12 V Backup Bat. V. Voltage at Vbat connection
AI: Internal Temperature Temperature inside the TB
OX
LT2
DI: STOP Button Input corresponding to the toggle switch in STOP position. To use STOP action,
go to the TWinSoft application, RTU properties -> Advanced -> Start/Stop
Group 2 - Digital Inputs
Group 6 - Counter
V+ V+ MUST BE POWERED
External voltage to V+ accepted With cabling only to DI: 8 → 30 VDC
With cabling to DI and DO: 11 → 30 VDC
Voltage at input
Typical 12 VDC
Maximum for a LOW level 2.0 VDC
Minimum for a HIGH level 7.4 VDC
Maximum 30 VDC
Resistance at input
Resistance > 39 kΩ
Sampling
Minimum period LOW – HIGH 15 msec – 15 msec.
Frequency (software) At each cycle of BASIC / Ladder
Protection
RC filter TBD
Voltage inversion No protection
Protection EMC RC
Isolation
Between inputs No isolation
To the power supply No isolation
Counter inputs
Input channels DI 0, DI 1, DI 2
Maximum frequency 10 kHz with duty cycle 45 .. 55 %
In all cases, V+ MUST be connected to prevent permanent damage; even when using the
channels as input.