T
he
reference
in
surface
TreaTmenT
International
Surface
Technologies
i s t s u r f a c e . c o m
26
AW16000 - Instruction Manual
1.3.2 Connecting DCP to Master Controller
The pressure module is attached to the Master Controller using ntegral connectors on both units. The
insertion ports for the pressure module are located in the upper left quadrant of the DCT1000 Master
Controller. The pressure module can be removed by compressing the retaining clips on each end of the
module, then gently pulling the module out of the master controller board. When inserting the module,
the following procedure should be adhered to insure proper installation :
•
Examine the bottom of the pressure module and note the orientation of the connectors.
•
align the module so that these connectors match the connector receptacles on the controller board
•
Orient the module with the four alignment pins over their respective mounting holes.
•
Gently press the module into the connectors and snap the retaining clips on either end of the module
into their slots.
•
always install and service this device with the power off and a lockout installed if required. “Hot”
plugging the pressure modul into an operating system may damage the system or cause the calibration
parameters to be erased.
When installing or removing the module make sure to orient the module straight with board. Installing or
removing the module at any angle may break the alignment pins.
1.3.3 — Pressure Model Locking Pins
The DCP100a and DCP200a are supplied with locking pins to secure the module. In normal operation
these are not required since the latching tabs are sufficient to secure the module even in a high vibration
environment. However if the unit is to be shipped or used where severe mechanical shock could be
encountered the locking pins ensure the module will not snap out of the board.
To install the locking pins, from underneath the module insert one pin behind each of the two latching
tabs. Press these all the way into the channel. The ends of the tabs will extend through the slots at the
top of these channels. Next insert the module in the board as described above, making sure it is properly
aligned and snaps firmly in place. Press the exposed locking tabs down until the tab is seated behind
the latch in the board. To remove the module, slide the locking tabs up using a small screw driver then
remove the module as described above. See Figure 3.
1.3.4 — Connections du DCP
When a pressure module is installed, the 4-20 ma process signal and the alarm relay contacts are available.
The 4-20 ma circuit is isolated from ground and other signals. The alarm relay contacts are isolated,
normally open contacts. Pressure connections may be made to the stepped hose barbs with either 1/8˝
or 3/16˝ I.D. tubing.
CAUTIOn : Do not force the module into the connectors. Forcing the insertion may damage
the connectors. Properly aligned, the module should snap into place.
1.3.5 — DCP Maintenance
The pressure module should require very little maintenance under normal operational conditions.
However, periodic calibration may be desirable to assure accuracy of the readings. The module may be
removed and returned to the factory for calibration.
1.0 — InSTALLInG THE DCT1000 (COnT’D)
