E2, Einstein, and REFLECS Controllers (The RLDS Gateway Board)
Connecting Communication Devices • 21
4.2.3. Connecting to an E2, Einstein,
or REFLECS Site Controller
Up to three RLDS units may be connected to a site
controller via the Gateway Board. The node address
switch on each RLDS must be set in succession from
1 to 3 in order for the Gateway Board to recognize the
units on the network.
Termination
The three RLDS units and the Gateway Board are
connected serially via MODBUS. If an RLDS is at the
end of the network segment, terminate the unit by
setting the termination switch to the DOWN position.
Otherwise, set the termination switch to the UP
position to leave the unit unterminated.
If the Gateway Board is at the end of a network, the
Gateway Board’s “Receiver Bus” termination
jumpers must be set to the “termination” position
. Otherwise, the jumpers should be set
to the “no termination” position.
Network Wiring
For network wiring, use Belden #8762 or #8641 cable
or equivalent. The total length of network cable in this
configuration may not exceed 4921 feet (1499
meters).
4.2.4. Connecting the Gateway
Board to the E2, Einstein, or
REFLECS Network
Each E2, Einstein, or REFLECS site controller that
will communicate with one or more RLDS must have
a Gateway Board installed on its RS485 I/O Network.
For E2 and Einstein controllers, this means the
Gateway will be installed on the RS485 I/O Network;
for RMCC, BEC, BCU, and other REFLECS
products, the Gateway will be installed on the COM
A or COM D network.
4.2.4.1. Wire Connection
Using shielded three-conductor network cable
(Belden #8641 or equivalent), connect the RS485 I/O
Network wire to the three-terminal connector on the
Gateway board as shown in
. For further
information about how RS485 networks are
configured, refer to your site controller’s user manual.
NOTE: If connecting RLDS units to an
Emerson site controller network, you MUST
number the units from 1-3. The Gateway
Board will not recognize any RLDS unit with a
number that is not 1, 2, or 3.
Figure 4-11
- RLDS Units Connected to Gateway, Site Controller
GATEWAY BOARD
RLDS LEAK DETECTORS
MODBUS NETWORK
E2, EINSTEIN, OR REFLECS
SITE CONTROLLER
RS485 I/O NETWORK
TERMINATE
RECEIVER BUS
JUMPERS
TERMINATE
"DOWN"
UNTERMINATE
"UP"
CONTROLLER
Figure 4-12
- Gateway Board Termination Jumpers
Summary of Contents for GW-810-3760
Page 1: ...Refrigerant Leak Detection System RLDS Installation and Operation Manual 026 1309 Rev 11 ...
Page 37: ...30 RLDS I O Manual 026 1309 Rev 11 Figure 4 22 Connecting the Gateway to the RS485 Network ...
Page 84: ...Appendix B System Menu Map B 79 Appendix B System Menu Map ...
