7
The dispenser is designed and built to be relatively maintenance free. To assure
trouble free operation, the following recommendations should be followed:
1.
Make certain air supply is clean and dry.
2.
Avoid turning barrels upside down or laying barrel so that material may
run through air line to internal components.
3.
Avoid connecting the unit to excessive moisture or solvent saturation.
4.
Avoid connecting air supply exceeding 100 psi (6.9 bar) for the DX-250
and 15 psi (1.03 bar) for the DX-255.
5.
Use only Amyl Alcohol to clean outside surface of the main housing.
6.
Use only soft cloth to clean the LCD.
9
SPARE PARTS AND ACCESSORIES
For DX-3xx/2xx spare parts and accessories information, please visit the DX-
3xx/2xx User Guide webpage at
http://www.metcal.com
10
LIMITED WARRANTY
Metcal warrants this product to the original purchaser for a period of one (1) year
from date of purchase to be free from material and workmanship defects but not
normal wear-and-tear, abuse and faulty installation. Defective product or
subassembly and components under warranty will be repaired or replaced
(at Metcal's option) free of charge. Customer with defective product under warranty
must contact the nearest Metcal office or distributor to secure a return authorization
prior to shipping the product to the assigned Metcal authorized service center. For
nearest Metcal office or distributor contact information, please visit
www.metcal.com. Metcal reserves the right to make engineering product changes
without notice.
11
I/O Configuration and End of Cycle Switch
8
During a dispense cycle, an open collector circuit closes and remains closed while
the valve is dispensing
.
Pin 3 and 4 can be as feedback signal to synchronize with
other devices. Power from an external source is allowed to pass through the circuit
to operate a 5 to 24 VDC load. Power consumption must not exceed 250 mA. The
load could be a relay, solenoid, counter, LED, or any device that will operate within
a 5 to 24 VDC range and a maximum of 250 mA.
Note:
During the dispense cycle, pin 3 will be grounded. Please make sure the
external device (your machine that controls the dispenser/controller) has the
same ground as the DX-250/255 controller.
Pin 7, 8, and 9 = Available
Chasis Ground
To initiate a dispense cycle
with
contact closure
When low pressure alarm is triggered, Pin 4 is grounded (-)
When low pressure alarm is turned off,
Pin 4 is not connected (opened)
End of Cycle Feedback
During dispensing cycle, Pin 3 is grounded (-)
End of dispensing cycle,
Pin 3 is not connected (opened)
To initiate a dispense cycle with voltage
Pin 1 (+)
Pin 2 (-)
Pin 3
Pin 4
Pin 5
Pin 6
Pin 5
