Zapi EPS-AC, Руководство по эксплуатации и инструкция пользователя, Страница: 22 / 52

Page 22
7 K1 This is the first (higher potential) safety switch connection.The
second connection is on Pin #1. This normally open contact is closed
by switching on the key. When the key switch is On, the contact
opens in case of steering alarm. If Jumper J2 is closed, ground is
provided on pin 7 whenever the key switch is on and there is no
alarm. If jumper J2 is open, the safety contact between NK1 and K1
is floating and may be referenced either to the plus battery
(connecting K1 to a plus battery voltage reference) or to the minus
battery (connecting NK1 to a minus battery voltage reference).
8 BUZZ This connection provides a ground line to switch on the status device
(it could be a 12Vdc buzzer device). It can sink up to 40mAmps. This
status device encodes steering alarm conditions.
9 DT+/QL This is a tacho-generator connection or a stepper motor line (called
Q line).
10 AUT This is the automatic request input. It can be either an active level or
edge detection depending by the AUTO INP ACTIVE setting (see
10.7.7). When the selected event happens an automatic centering
request will immediately start. This input pin may be connected to:
1. An external ground through a switch.
2. An internal ground (Pin #4) through a switch.
3. An external open collector transistor (For example an output of a
photocell circuit).
To recognize an automatic request each level should remain for at
least 30msec.
11 KEY This is the key switch voltage input.
12 RLS Right (CW) Limit Switch. It's possible to stop steering in the direction
that causes positive signal from the tacho-generator by closing the
connection between RLS (Pin #12) and negative (GND Pin#5).
Therefore, connection of a normally open switch between Pin #12
and Pin #5 acts as a Clockwise steering limit switch.