West Control Solutions N8080 (for 2xxx) - Manual (Page 26)

2.2 REMOVING/REPLACING THE RELAY 2/LINEAR OUTPUT
OPTION PCBs
With the Indicator removed from its housing:
1. Gently push the rear ends of the CPU PCB and Power Supply PCB apart
slightly, until the to tongues on each of the Relay 2 Option PCB and the
Linear Output Option PCB become disengaged - see Figure 2-2B; the Relay
2 Option PCB tongues engage in holes in the Power Supply PCB and the
Linear Output Option PCB tongues engage in holes in the CPU PCB.
2. Carefully pull the required Option PCB (Relay 2 or Linear Output) from its
connector (the Relay 2 Option PCB is connected to the CPU PCB and the
Linear Output PCB is connected to the Power Supply PCB) - see Figure 2-2C.
Note the orientation of the PCB in preparation for its replacement.
Adjustments may now be made to the link jumpers on the Linear Output Option
PCB (to select the output range - see Subsection 2.5).
2.3 REMOVING/REPLACING THE RS485 SERIAL
COMMUNICATIONS OPTION PCB/DIGITAL INPUT
OPTION PCB
The Serial Communications Option PCB or the DC Input Option PCB (the two are
mutually exclusive) is mounted on the inner surface of the Power Supply PCB and
can be removed from the unhoused Instrument by pulling the Option PCB towards
the rear of the Power Supply PCB. Figure 2-3 illustrates the removal/replacement
procedure. It is not necessary to remove the Relay 2/Linear Output Option PCBs to
perform this procedure.
2-3 Volume II PM091-2
59136
Figure 2-3 Removing/Replacing the Serial Communications/Digital
Input Option PCB