LN Series LN-VSTAT and LN-PSTAT Sensors Installation Instructions
7
Communications Wiring
You can optionally wire Terminals 3 and 4 of the
LN-VSTAT and LN-PSTAT sensors to the LON
terminals of the controller. Before you insert multiple
wires into any of the terminals on the controller, ensure
you properly twist the wires together.
You can access the LON network with a laptop by
plugging into the communications jack on the
LN-VSTAT with a 1/8 in. audio plug.
Approved cable types for LON communication is Level
IV 22 AWG (0.65 mm), UNSHIELDED. You can use
both one pair and two pair wires. The LON
communication wire is not polarity sensitive and can be
laid out in a bus, star, loop, or free topology network
configuration. For loop topology, polarity is important,
take special care when connecting the LON network to
avoid a short circuit.
Note:
The LN-VSTAT and LN-PSTAT sensors do not
have an effect on the network topology for LON
networks.
Note:
The Bus topology network configuration allow
for easy network troubleshooting for LON
communication wiring.
Topology Wiring Choices
If the distance between the sensor and the controller
(stub length) is less than 3 meters a bus topology must
be used (Figure 11). If the stub length is greater than 3
meters, a free topology in a daisy-chain manner must
be used (Figure 12).
Note:
In Figure 11 and Figure 12, the wire runs from
the two communication terminals of the LN-VSTAT and
LN-PSTAT sensors to the LON/NET terminals of a
controller. When you insert multiple wires into the
terminals, ensure you properly twist the wires together
prior to inserting them into the terminal connectors.
Figure 10: LN-Sensor to an LN-PSTAT Sensor Wiring Details
S M R T + S M R T-
1
6
5
4
3
2
+
-
-
+
+
-
IN
P
U
T
+
COM
IN
P
U
T
+
OUT
P
UT+
(0
-1
0
VD
C
o
r
2
4
VA
C
)
C o m .
1 C o m.2
TO
SM
R
T
+
TO
SM
R
T
-
OU
T
P
U
T
-
L N -- S E N S O R
L N - P S T A T