Page 11 of 72
11
Installing the Gateway
LAARS ProtoNode Start-up Guide
11
3
Interfacing ProtoNode to Devices
3.1
Device Connections to ProtoNode
The ProtoNode has a 3-pin Phoenix connector for connecting RS-485 devices on the R1 port.
NOTE: Use standard grounding principles for RS-485 GND.
Device Pins ProtoNode
Pin Label
Pin
Assignment
RS-485 +
TX +
RS-485 +
RS-485 -
RX -
RS-485 -
RS-485 GND
GND
RS-485 GND
3.2
Wiring Field Port to RS-485 Serial Network
•
Connect the RS-485 network wires to the 3-pin RS-485 connector on the R2 port. (
Figure 6
)
o
Use standard grounding principles for RS-485 GND
•
See
Section
4
for information on connecting to an Ethernet network.
BMS
Wiring
ProtoNode
Pin Label
Pin
Assignment
RS-485 +
+
RS-485 +
RS-485 -
-
RS-485 -
-
GND
RS-485 GND
Figure 5: RS-485 Connections from Devices to the ProtoNode
Figure 6: Connection from ProtoNode to RS-485 Field Network
G
-
+
G
-
+
20
Industrial Way, Rochester, NH, USA 03867
•
(800) 900-9276
•
www.Laars.com
Gateway Installation and Operating Manual