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- Via Toscana, 57/59 - 20090 BUCCINASCO (Mi) - ITALY - tel. 02 - 45713300 - www.sielco.org
EXC/RTX19 - USER & MAINTENANCE MANUAL - rev.1.5 - 05/16
Page 13
RECEIVER:
-
Pins 1 & 5
Ground
.
-
Pin 2, “
modulation ok”
output. Open collector transistor circuit with a resistive pull-up:
a low logic state signals modulation is present on the received signal. On the contrary, a
high logic state, + 12V / 10k
Ω
, warns on modulation loss. As alternate function the pin
may be assigned to signal “
remote lock”
status.
-
Pins 3 & 8, “
field good”
. The insulated contacts of a relay are wired to these pins: the
relay is default driven by the received RF. When the field trespass the preset threshold, the
relay is excited. The contacts may be chosen through an internal bridge to be
"normally
open (n.o.)"
or
"normally closed (n.c.)"
. Factory default is
"n.o."
. Alternatively the relay
may be assigned to “
Alarm”
-
Pin 6,
"LF disable"
input. Base input of a common emitter transistor with a resistive pull-
up. A shorted circuit to ground disables main LF outputs. Maximum voltage and current
available are nearly +10V and 1mA. Alternate function is “
Remote lock”
: when choosen,
a shorted circuit disables front panel setup functions.
-
Pin 7,
Alarm
output. Open collector transistor circuit with a resistive pull-up: a logic low
signal means alarm condition. Correct functioning is signalled by +12V with10k
Ω
impedance. Maximum current sinking capability <10mA. This pin may be alternatively
assigned to signal “
Field good”
-
Pins 4 & 9: future upgrades
Transmitter serial and parallel
remote control I/O ports
Receiver serial and parallel
remote control I/O ports