Edwards 3-CPU3 Installation Sheet

3-CPU3 Central Processor
Module Installation Sheet
Description
The 3-CPU3 Central Processor Module is the control element for all
rail modules and control/display modules installed in a control panel.
The 3-CPU3 module performs the following functions:
• Processes all information from modules installed within the cabinet
as well as data received from other panels over the network data
circuit
• Identifies and supervises all modules installed on the rail chassis
and uses an integral watchdog to identify both hardware and
software faults
• Supervises all traffic on the rail bus and implements ground fault
detection
• Date-time stamps events and initiates timed events using an
internal clock with leap year function
• Communicates with other 3-CPUx and 3-ANNCPUx modules over
a Class A or Class B network data circuit (requires an optional
Network Communications card)
• Distributes audio messages across a Class A or Class B network
audio circuit (requires an optional Network Communications card)
In addition, the 3-CPU3 module:
• Provides connections for two optically isolated RS-232 serial ports
(requires an optional 3-RS232 card)
• Provides command and control functions for the eight-channel
digital audio subsystem installed on the rail
• Provides an optically isolated RS-232 port for data uploads,
downloads, and system maintenance
• Provides a Form C common alarm, common trouble, and common
supervisory relay
All field wiring connections to the 3-CPU3 module are made using
plug-in connectors.
The 3-CPU3 module occupies the two leftmost positions on the rail
chassis assembly (logical address 0). The 3-CPU3 ships without
plastic doors and mounting brackets. Before you can install a 3-CPU3
you must attach the mounting brackets supplied with an LCD main
display module or a 3-CPUDR, both ordered separately.
Note: The 3-CPU3 is a replacement for the 3-CPU module and the
3-CPU1 module.
Installation
1. Attach the mounting brackets from the LCD main display module
or the 3-CPUDR to the 3-CPU3 module. For detailed instructions,
see their respective installation sheets.
2. Install the network communications option cards, if required. For
detailed instructions, see their installation sheets.
3. Align the option cards to the card guides, and then slide the
3-CPU3 into the first two rail slots on the rail chassis assembly.
See Figure 1.
© 2016 United Technologies Corporation
4. Gently push the 3-CPU3 until it is firmly seated into the rail
connectors.
5. Secure the module to the rail by pushing in the plungers on the top
and bottom display mounting brackets.
Figure 1: Mounting diagram
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(1) Display mounting brackets (supplied separately)
(2) Primary power supply monitor card
(3) Primary power supply
(4) 3-CPU3
(5) 3-CHAS7
Wiring
Wire the 3-CPU3 as shown in Figure 2 through Figure 6.
Notes
• Network data circuit wiring and network audio circuit wiring is
supervised and power-limited.
• When connecting a network data circuit, always wire the Network
B (isolated) terminals on one CPU module to the Network A
(nonisolated) terminals of another. See Figure 2.
On Class B network data circuits, the control panel designated as
the service panel must be the first panel on the network. On
Class A network data circuits, any control panel can be the service
panel.
• Common relay wiring is unsupervised and power-limited only when
connected to a power-limited source.
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P/N 3100648-EN • REV 05 • ISS 13DEC16