Sterlco SF1000 Gravimetric Additive Feeder - Manual (Page 10)

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3.3.2 "Sensor" cable wiring options:
There are two alternatives for wiring the "Sensor" cable to the injection machine (see Fig 6):
Alternative A (Standard):
Connecting the "Filling" wire (black) and the "Common" wire (red) to a "Filling" dry contact in
the injection machines, which is synchronized with the Filling phase
– indicating the
Recovery phase time (machine's screw backward motion).
Using this standard wiring will ensure only the synchronization of the Sterling SF-1000
operation to the injection machine's cycle time, and MB feeding during the Filling (Backward
motion) time.
Alternative B (Optional):
Connecting the "Injection" wire (Green) to another dry contact which is synchronized with the
Injection phase
– indicating the Plasticizing/Injection time (screw's forward motion).
This optional wiring will cause feeding of MB both during the Filling phase and (a certain
amount) during the Injection phase as well, thus enabling better color dispersion.
Notes:
a)
The "Filling" contact should be always connected in both alternatives A and B.
The "Injection" contact should be connected only when a MB feeding is required
during injection phase as well.
b) The contacts should be No Voltage Contacts (Dry contacts) only.
Fig 6: "Sensor" cable connections diagram