CHAPTER 4: CONNECTING TO DEVICES AND NETWORKS
D400 SYSTEM REDUNDANCY
D400 SUBSTATION GATEWAY USER’S MANUAL
GENERAL
67
Required components
To implement a redundant D400 system, you need the following components:
:
NOTE
The serial ports on your D400 are galvanically isolated from each other, however, when the
RS232 switch panel is used, the serial common of all ports are tied together.
NOTE
Pins 4 on switch panel connectors J2 through J9 are tied together and to the panel’s power
supply. Any loading from field devices on these pins will load the RS232 panel power
supply and should be taken into consideration when sizing power supplies.
NOTE
The D400 RS232 adapter card that contains the redundancy control port must use the DTE
(default) switch positions. Refer to
“Switch SW1/SW2 configuration” on page 34
and
“Switch
SW3/SW4 configuration” on page 35
. This card must also be revision 08A or higher (the
revision number is shown on a white label affixed to the top or bottom of the RS232
adapter card). If your card is 07C or below, please contact Customer Service.
To set up a redundant
system:
It is recommended that you install and configure one standalone D400 unit to ensure that
your configuration is valid and that device communications are operating properly. Once
this is done, proceed with the installation of the redundant system.
1.
Mount the D400 units in a rack and connect power and ground. Refer to “Power
connections” on page 76.
2.
Mount the RS232 switch panel.
3.
Plug the connector of watchdog cable A (GE part no. 977-0540) to a serial connector
on the first D400 (CCU A).
4.
Plug the connector of watchdog cable B (GE part no. 977-0541) to a serial connector
on the second D400 (CCU B). This cable must be connected to the same serial port
number on both units.
5.
Connect the bare leads of both watchdog cables to TB1 on the RS232 switch panel
and the DB9 serial connector to either P1 or P9 as shown below.
6.
Connect one end of the ping cable to the first D400 and the other end to the second
D400. This ping cable must be connected to the same serial port number on both
units.
7.
Use standard RS232 cables (GE part no. 977-0145) to connect the D400 serial
communication ports to the serial ports on the RS232 switch panel. P2 through P8 are
connected to the first D400, P10 through P16 are connected to the second D400.
Component
Function
Part Number
RS232 Switch Panel
Communications switch.
517-0247
Power Supply
Power supply to power the RS232 switch panel.
Input: 85 – 264 VAC or 90 – 350 VDC.
580-0046
Watchdog Cable Assembly Connects D400 A to the RS232 switch panel.
977-0540
Connects D400 B to the RS232 switch panel.
977-0541
Ping Cable Assembly
Links both D400 units to facilitate a heartbeat
message that determines the status of the active
unit.
977-0146
RS232 Serial Cable
Connects the D400 to the RS232 switch panel which
is then connected to external field devices.
977-0145
Power/SysFail Cable
Connects the RS232 switch panel to an external
power supply and to the D400 SysFail terminal
block.
970-0161
Ground Cable
Provides a ground connection for the RS232 switch
panel.
970-0182
