User Guide

Input/Output

Connection

Voltage Initiate Circuit

The Ultra 2800 workstation may be initiated with a 5 to 24 VDC signal across pins 1 and 2. These

two input pins are current driven and optically isolated. From Programmed Dispense mode, this

signal can be momentary (no less than 0.01 seconds) or maintained. In this mode, a new dispense

cycle begins once the 5 to 24 VDC signal is removed and then applied again.

When this input circuit is activated in Manual mode, a continuous bead is dispensed until the signal

is removed.

Mechanical Contact Initiate

The Ultra 2800 can be initiated via the closure of mechanical contacts such as a relay or switch

using pins 7 and 8. The timing and actuation rules for the contact closure input are identical to the

voltage initiate input description.

End-of-Cycle Feedback Circuit

Upon completion of a dispense cycle, a solid-state switch closes and remains closed until the next

dispense cycle. This circuit is normally closed when a dispense cycle is not active. Pins 3 and 4 of

this circuit can be used to signal back to a host computer, start another device in sequence or

initiate other operations that need to be tied into the completion of the dispense cycle.

The circuit is an optically isolated transistor output designed to operate between 5 to 24 VDC,

100mA maximum.

Pin Function

1. Voltage initiate +, 5-24 VDC (22mA at 24 VDC)

2. Voltage initiate -

3. End-of-cycle feedback output +, 5-24 VDC (100mA maximum)

4. End-of-cycle feedback output -

5. 24 VDC supply + (100mA maximum)

6. 24 VDC supply – (ground)

7. Contact closure +, 10mA

8. Contact closure – (ground)

Notes

1. An 8-pin DIN connector and cable assembly is available. Order EFD part #2446.

2. 2800 operation is identical for dispense initiation from I/O inputs or the foot pedal.

3. Pins 6 & 8 of the I/O connector are internally connected to signal ground.

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