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OPTIONAL COMMUNICATIONS PORT CONNECTION: PIN-OUT
Isolated Initiate
Isolated Initiate (10ma typical)
Non-Isolated Initiate
CONNECTION: ISOLATED INITIATE CIRCUIT
± 10mA typical
V
F=
250 mSec min. closure
2.2kΩ
FWD MODE & END OF CYCLE FEEDBACK CIRCUIT
During FWD Mode, pin3 is pulled down and end of
dispensing cycle is open collection
3 SEC
+35VDC max.
50mA max.
1.2V typical
FWD Mode & End of Cycle Feedback
BWD Mode & End of Cycle Feedback
Not Connected
CONNECTION: NON-ISOLATED INITIATE
(FOOTSWITCH)
External Relay/
Switch
Ground
250 mSec min. closure
Metcal recommends full isolation of external device or
common ground with unit
BWD MODE & END OF CYCLE FEEDBACK CIRCUIT
During BWD Mode, pin 4 is pulled down and end of
dispensing cycle is open collection
+35VDC max.
50mA max.
+5VDC
10kΩ
10
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