PCC-IV Instruction Manual (rev. 0.2)
Page 2-26
Section 2 - Installation
Field Installation of Option Boards
WARNING
The PCC-IV is commonly used to control potentially dangerous combustion and chemical processes. VERIFY THAT
THE PROCESS BEING CONTROLLED HAS BEEN SAFELY SECURED, ISOLATED, OR BYPASSED (AS
REQUIRED BY THE SITE CONDITIONS) BEFORE REMOVING POWER FROM THE PCC-IV CONTROLLER.
FAILURE TO DO SO CAN RESULT IN EQUIPMENT DAMAGE, INJURY, OR DEATH.
WARNING
It is very common to have multiple sources of power among the wires connected to a PCC-IV. VERIFY THAT ALL
SOURCES OF POWER HAVE BEEN DISCONNECTED BEFORE WORKING ON WIRING. FAILURE TO DO SO
CAN RESULT IN INJURY OR DEATH.
The quantity of PCC-IV input and output channels can be expanded by adding up to three plug-in option boards.
These option boards can be field installed by competent instrument technicians. Refer to the procedure below, the
drawing below, and the CPU board layout drawing above.
If the PCC-IV is controlling a process,
it must be safely taken out of the control loop
before attempting to
install any option cards.
Remove all power
to the instrument.
Multiple power sources may be present
.
Remove the front panel from the PCC-IV:
•
Remove the screw on the top of the front panel.
•
Grasp the top corners of the front p
anel and move it forward, away from the case, about ½”.
•
Move the front panel u
pwards and away from the case about ½”.
•
The front panel should now be free.
•
Depress the two retainer clips on each side of the ribbon cable connector on the CPU board and
remove the ribbon cable connector.
Remove the rear cover from the PCC-IV.
Note where each field wiring terminal strip connector is plugged-in.
Unplug the field wiring terminal strip connectors at the rear of the circuit boards.
Unscrew the board-to-case retainer screw (see CPU board layout). It is in the lower rear area of the CPU
board, next to the JP1 250-ohm jumper header.
Prepare a static free work area and protect all circuit boards from a static discharge.
Slide the main PCB out of the PCC-IV and place on a static protected mat.
Install the option cards as shown below.
Reassemble the instrument in reverse order.
Calibration may be required, see Section 4, “Calibrate I/O Submenu”.
Wire the new option board(s).
Installation of Option Boards onto CPU Board (Side View)
CPU Board
Option Board
Field Wiring
