User Manual

5. ELECTRICAL DESCRIPTION
23
LZ T 123 7605 P1C
The power connector electrical characteristics are listed below:
Note! Signal OUT-2 on the RJ12 connector is switched in parallel to signal
OUT-4 on the 15-pin high density socket. The individual output signals
are generated by two different low side switches inside the module driven
from a common control signal.
5.1.1 Power Supply Interface
The supply voltage V
IN
and GND are protected against polarity reversal
and over voltage.
The Control Terminal switches on automatically once the V
IN
voltage is
applied.
Note! The Control Terminal will not switch on if TO_IN is shorted to ground
when the dc supply is applied.
Note! For more information on switching the Control Terminal on and off please
see section “Operation”, page 39
Note! Please be aware that the total current carried via either the V
IN
or GND
pins will be the sum of the intrinsic power consumption of the Control
Terminal and any drive current supplied via OUT-1 or OUT-2 (or other
IOs). The current on either of the V
IN
or GND pins must not exceed 1.5A.
Caution! It is recommended that the system integrator provides appropriate fusing
otherwise the Control Terminal may be damaged. See “Current
Consumption with external +4.8V Supply Active”, page 53 for more
details.
Pin Signal Dir Limits Description
1 V
IN
I 5 to 32V Positive power input
2 OUT-2 O 32V, 0.25A Low side switch, short circuit protected
3 IN-1 I –0.5 to 32V Digital Input
V
IH
> 3V, V
IL
< 2.8V
Internal Pull Down of 40kΩ
4 TO_IN I –0.5 to 32V Active low control line used to switch
the GT47 off/on.
V
IH
> 5V, V
IL
< 2V
Power off/on: t > 0.2s
Internal Pull Up to V
IN
of 20kΩ
5 OUT-1 O V
IN
, 0.4A High side switch, short circuit protected
6 GND I - Negative power (ground) input and
return path for TO_IN and the extended
inputs and outputs