Emerson CH Breaker Gateway, Installation And Operation Manual

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4 • CH Breaker Gateway I&O Manual 026-1710 Rev 1 05-15-07
4.1.3. Setting the NET Switches
The PRC100MOD controller has a pair of switches
that, when switched to the OFF position, breaks the MOD-
BUS network connection. Verify that these switches are in
the ON position as shown in
Figure 4-4 to enable MOD-
BUS communication.
4.2. Connecting the Gateway to
the RS485 I/O Network
Using shielded two-conductor network cable (Belden
#8761 or equivalent), connect the RS485 I/O Network wire
to the three-terminal connector on the Gateway board as
shown in Figure 4-5 . For further information about how
RS485 networks are configured, refer to your site control-
ler’s user manual.
4.2.1. Gateway Board Numbering
The E2, Einstein, or REFLECS controller interprets the
Gateway board as one or more 16AI Analog Input boards
and one or more 8RO boards numbered in succession. Ad-
dressing the “boards” represented by the Gateway is
achieved using the HHT.
1. Plug the HHT into the HHT jack.
2. From the opening screen, press the DOWN
ARROW key to display the Board Addresses
screen (Figure 4-6) .
3. Press RIGHT ARROW to move the cursor to
the # of Brk Grps field. Enter the total number
of breaker groups you will be controlling.
When finished, press RIGHT ARROW to
move the cursor to the 16AI Start field.
4. The end ranges for the 16AI and 8RO boards
will adjust based on the number you entered
in step 3. For every 16 breaker groups, anoth-
er 16AI board number will be added to the
End range up to a maximum of 3. For every 8
breaker groups, another 8RO board number
will be added to the End range, up to a maxi-
mum of 6.
5. Enter the 16AI board number that will be the
lowest in the Gateway’s Start-End range.
Press RIGHT ARROW. The End range value
will change to show the new Start-End range
of board numbers.
6. Enter the 8RO board number that will be the
lowest in the Gateway’s Start-End range.
Press RIGHT ARROW. The End range value
will change to show the new Start-End range
of board numbers.
4.2.2. Setting the Baud Rate Dip Switch-
es
Dip switches 6 and 7 control the baud rate at which the
Gateway communicates with the site controller on the
RS485 Network. These switches must be set to the same
baud rate setting as the E2, Einstein, or REFLECS (usually
9600 baud).
There is no dip switch to set the MODBUS baud rate.
Since the PRC100MOD control board is fixed at 9600
baud, the Gateway board also uses a fixed 9600 baud rate
for MODBUS.
Figure 4-4 - MODBUS Network Enable/Disable Switches
Figure 4-5 - Connecting the Gateway to the RS485 Network
NET
SWITCHES
LEGEND
OFF
OFF
PUSH
ROCKER
UP
PUSH
ROCKER
DOWN
SET SWITCHES TO
"ON" POSITION
TO ENABLE
MODBUS NETWORK
Figure 4-6 - Starting Board Addresses Screen
#of Brk Grps: 2
ADDR Start End
16AI 1 - 1
8RO 1 - 1