LG Niagara Framework MultiSITE E10 Installation Manual page 11

Wiring - continued
Prerequisite: A nearby earth grounding point.
1. Install the included earth ground wire (1) to the controller's earth ground spade lug (2), and terminate the
other end to a nearby earth ground (3).
2. Unplug the controller's 2-position power connector (4) and terminate a 24 V supply source (5) to the connec-
tor. Leave connector unplugged for now.
RS485 Wiring
On the controller's top side, a single, non-isolated, RS485 port provides connection to IO-R-34 module or to
other RS-485 devices (NRIO, BACnet MS/TP, MODBUS). Do not use this port to connect to other controllers.
Use shielded, twisted-pair, 18-22 AWG cabling to wire in a continuous multidrop fashion to other RS485 devices:
"minus to minus", "plus to plus," and "shield to shield". 10K bias resistors are permanently connected. There is no
built in termination resistor. Maximum total cable length is 1,000 feet (304.8 meters).
Connect the shield wire to earth ground at the MS-E10 Controller end only. The following image shows example
wiring.
BACnet MS/TP
1
0 V U5 U4 0V U3 U2 0V U 1 0V AO2 0V AO1 A B A B A B
UNIVERSAL INPUTS ANALOG OUTPUT D3 D2 D1
RS485
DIGITAL OUTPUTS
A
SEC PRI
24 VAC/DC DEBUG FACTORY
GND RESET
Fox
2
0 V U5 U4 0V U3 U2 0V U 1 0V AO2 0V AO1 A B A B A B
UNIVERSAL INPUTS ANALOG OUTPUT D3 D2 D1
RS485
DIGITAL OUTPUTS
- Fox
- BACnet/IP
- Modbus/TCP
- SNMP
SEC PRI
24 VAC/DC DEBUG FACTORY
RESET
GND
RS485 port supporting a trunk of RS-485 devices (3 maximum).
1
(A) Niagara Supervisor
(B) Devices
RS485 port connected to a single IO-R-34 module.
2
Example wire terminations to IO-R-34 using RS-485.
3
(A) Ground at one point on MS-E10 end only.
(B) Use shielded twisted pair wiring
NOTE: Do not mix an IO-R-34 with other types of RS485 devices on the same RS485 trunk.
NOTE: RS485 devices on the same network should use the same protocol and baud rate. Up to 50 total external points across
3 external devices are supported.
3
RS-485
B
-
+
B S
A
B
NR IO
–
+
IO-R-34
S
B
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INSTALLATION
11