t.a.c. I/A MicroNet MN-S Series User Manual

10 © Copyright 2006 TAC All Rights Reserved. F-26277-7
TAC MicroNet LONWORKS Network (LON) Wiring
An approved Category 4 or 5, twisted-pair cable may be used for the optional LONWORKS
network connection between the controller and MN-Sx sensor. L
ONWORKS network wiring is
polarity insensitive.
Note:
• LONWORKS network wiring is polarity insensitive.
• Shielded cable is not required for LONWORKS network wiring.
• If conduit is used between a TAC I/A Series Sensor and a controller, the TAC MicroNet
L
ONWORKS network and S-Link wiring can be in the same conduit.
• Do not mix LONWORKS network wiring with UI, DI, AO, DO, or power types of wiring.
• LONWORKS network wiring must be dedicated to TAC MicroNet LONWORKS network
communications. It cannot be part of an active, bundled telephone trunk.
• If the cable is installed in areas of high RFI/EMI, the cable must be in conduit.
• If shielded wire is used for the LONWORKS network, the shield must be connected to
earth ground at only one end by a 470 K ohm 1/4 watt resistor. The shield must be
continuous from one end of the trunk to the other.
• To preserve the integrity of the network, the LONWORKS network wiring connecting a
TAC I/A Series MicroNet controller to an MN-Sxxx Sensor must be run to the sensor
and back, in daisy-chain fashion. A wire “spur” must not be used to connect the sensor
to the controller.
• While the MN-Sxxx Sensor is not counted as a “node” in the TAC MicroNet LONWORKS
network, all L
ONWORKS network wiring to the sensor must be counted when
determining the length of the LONWORKS network wiring segment.
TAC I/A Series MicroNet Controllers use L
ONWORKS Free Topology Transceivers and
support polarity insensitive bus (daisy-chain) and free (all combinations of star, tee, and
loop) wiring topologies. See
TAC I/A Series MicroNet System Engineering Guide , F-26507
to design a TAC MicroNet L
ONWORKS TP/FT-10 network, including recommended
topologies and approved cable types.
Connecting the L
ONWORKS network to a TAC I/A Series MicroNet Sensor provides local
access to the network via the sensor’s L
ONWORKS network jack. Four wires (a daisy chain
connection) must be used to connect a TAC I/A Series MicroNet Sensor to a L
ONWORKS
network. This connection is optional.
Connect L
ONWORKS Network to TAC I/A Series MicroNet Sensor
1. Strip 1/4 in. (6 mm) of insulation from LON wires.
2. Connect wires to screw terminals 3 and 4 (Figure-7). The LON terminals are polarity
insensitive.
3. Push excess wire back through the baseplate to minimize air flow restriction.
Wiring Checkout Verify wiring between TAC I/A Series MicroNet Sensor base plate and the TAC I/A Series
MicroNet Controller is installed according to job wiring diagram, national and local wiring
codes.
Electronic Assembly
and Cover Installation
Caution:
• Observe static precautions when handling electronic assemblies.
• Handle electronic assemblies with care to prevent damage to the temperature and
humidly sensing elements.
• Do not touch humidity sensing element on the MN-SxHT and MN-S4HT-FCS models.
The element is located beneath a small plastic housing on the back of the electronic
assembly.
Failure to observe these precautions can damage the sensor.
1. Set electronic assembly onto bottom hooks of base plate.
2. Secure electronic assembly to base plate by tightening two screws at top of assembly
(Figure-8).

t.a.c. I/A MicroNet MN-S Series Specifications

General

Brand	t.a.c.
Model	I/A MicroNet MN-S Series
Category	Temperature Controller
Language	English