Functions of Machine Interface
INTF1
General description
The machine interface serves as connection between the SK process monitoring systems and the
machine controls. Firstly, the interface contains a set of relays which are used to transfer switching
signals towards the machine (e.g. stop machine, flip sorting gate, etc.). Secondly, the interface has
terminal connectors which are used to input various digital signals from the machine, such as the
timing signal, finger-open signal on multi-die machines, ESA-input on hot formers, etc.). In
addition, the interface also provides through it’s built-in supply unit the 24 VDC power to the
IMPAX-SK unit.
Switching functions
The standard interface contains 6 relays rated at 12A/250VAC. Each relay offers normally-open and
normally-closed contacts. The LED next to the relay shows it's current status. If the LED is lit relay
coil is powered; if the LED is off the relay coil is powerless (low).
Relay #1 (Sorting) / Relay #2 (Batching):
Both relays are normally powered. They will drop to give the sorting or batching signal.
Relay #3 and #6 (Motor-Stop) / Relay #4 (Emergency Stop):
All 3 relays are normally powered. They will drop to switch the motor off or to switch emergency
stop. The “Motor Stop” relays #3 and #6 will switch every time the process monitor goes into
stop. Relay #4 "Emergency Stop" will be switched in addition with a delay of about 1 minute when
a stop signal is given during AUTO2-mode (unmanned shifts). This relay is typically used to switch
off every electrical component on the machine when it stops during unmanned shifts.
By-Pass key switch
The by-pass key switch located on the outside of the interface box will force all relays to stay in
their normal position. The process monitoring system can now be removed from the machine, and
the machine is able to run without the monitor. In case of total power failure inside the interface, all
relays must be bridged in order to run the machine without the monitoring system.
Good-part-made pulse output
The good-parts-made output pulses a short signal for every good part made when the machine is
running. Some data networking systems require such a signal to tell if the machine is running or
not. No output signal is given in case of machine downtime, or when the machine runs idle.
Digital inputs
The following digital inputs are reserved for fixed functions:
INI 1: timing signal input (proximity switch)
INI 2: second timing signal input, only needed for synchronization on rotary die headers!
(normally, prox switches are not connected here but inside the sensor box)
The other inputs are reserved for future functions.
Rev 2.0
V5.2 E 10/04
