Download CDA PC44 Operating instructions

3-24
Installation
9. PC40 Remote
Communications Installation
The following information is provided if you will be using a remote
device to select active memory and/or lock out input through the PC40
user interface.
Remote connections are made to PC40 terminal block P1 (Figure 3.9) .
Signals connected to P1 are optically isolated from the remote system.
The opto-isolators can be turned on by either current sourcing or
current sinking devices.
Remote Pin Characterization
Table 3~ 9 - Remote Communication Pin Characterization
Pin
Function
Comments
P1-1 ("Shield")
Provided for field wiring convenience.·
Connected to the remote device 1/0
printed circuit board.
P1-2 ("Ground")
Provided for field wiring convenience.
Connected to the remote device 1/0
printed circuit board.
P1 -3 ("Common")
Provides for one half of the connection for
all of the opto-isolators.
For sourcing (PNP) devices, P1-3 should
be connected to P1-2 ("Ground") . For
sinking (NPN) devices, P1-3 should be
connected to P1-8 ("+12V").
Pl-4 ("lock")
Provides for a remote signal to disallow
access to the PC40 Program Mode.
P1-5 ("Remote
Memory Select 3")
Provides connection to allow a remote
device to change the active memory.
P1 -6 ("Remote
Memory Select 2")
Provides connection to allow a remote
device to change the active memory.
P1-7 ("Remote
Memory Select 1")
Provides connection to allow a remote
device to change the active memory.
P1-8 {"+1 2V")
Provides 12 VDC input power for any
remote device that requires it.
PIN 108389A
57-28 11!13
Maximum current available from pin P1 -8
is 500 mA.This is the maximum current
available for all connections to pin P1 -8
including loads on other PC40 connectors.
C Nord son Corporation 1993
All R 1g~ts Reserved