Table of Contents
Advertisement
BACNET IP
Table 12. Default IP Address
Static IP Address
Subnet Mask
Default Gateway
Connecting to a IP network
MERLIN NX IP VAV controller communicates over wired
IPV4 network using Ethernet connection via either RJ45
port.
DHCP IP Configuration
If DHCP mode is enabled:
• On power-up; for first 15 seconds, controller will search
for a DHCP server to acquire an IP address.
• If DHCP server (Switch) is not found, controller will
switch to Auto IP mode in which it follows Link Local
Addressing for address resolution.
• The controller acquires an IP address in range
169.254.1.0 - 169.254.254.254. It uses last 2 characters
of its Serial Number as last octet for starting address
search. For example if the serial number ends with "36"
(decimal value = 54), the IP address is set to
169.254.1.54.
NOTE: From the firmware version 0.0.0.50 onwards, if a
controller has the Link Local Addressing, it will peri-
odically search for DHCP server (every 1 minute). If
server is found, controller acquires the new IP
address from server and start using it immediately.
Static IP Configuration
Static IP address can be configured using Niagara
workbench.
Navigate to IP configuration under IP settings.
1.
Select the IP address as Static.
2.
Select Enabled as True.
3.
Configure a valid IP address.
4.
Fig. 27. Static IP Configuration
MERLIN NX IP AND MST/TP VAV CONTROLLER - INSTALLATION INSTRUCTIONS
192.168.0.2
255.255.255.0
192.168.0.1
Refer IRM Engineering Tool User Guide for more
information on how to do this.
Network Topologies
— Recommended cable: Cat5/Cat6
— Maximum distance between 2 controllers or control-
ler and switch should be less than 328 ft. (100
meters)
Non-Failover (Daisy Chain)
In non-failover, that is daisy chain connection type, if any of
the device in the network fails, the devices next to the failed
device also fail.
For example, there are 10 devices in a network and device
number 1 is the master device, which connected to device
2, and device 2 is connected to 3, and so on. If device 5
fails to function, the device after 5, that is 6, 7, 8, 9, and 10
also fail to communicate with master device.
Maximum number of controller that can be connected in a
daisy chain is 100.
Daisy Chain Topology (maximum 100 controllers)
Supervisor/
#1
Web Browser
Fig. 28. Daisy chain topology
Spanning Tree Protocol (RSTP)
If the MERLIN NX IP VAV controllers are to be connected in
a redundant ring, then you must have one spanning tree
protocol supported Ethernet switch as a part of the ring.
MERLIN NX IPVAV supports Ethernet switch for 10/100
Mbps IP connection.
The switch will connect MERLIN NX IP VAV ring with the
backbone network.The loop-free topology ensures that
there is no broadcast storms and duplicate frame
transmission. Maximum number of controllers that can be
connected in STP loop is 40. The connection of a loop
managed by a switch.
STP Ring Topology (maximum 40 controllers)
Supervisor/
#1
Web Browser
Fig. 29. STP wiring
23
#2
#3
#4
#N
#2
#3
Multi Port (STP)
Ethernet Switch
EN1Z-1076GE51 R1021
Advertisement
Table of Contents
