York Universal LINC485 User manual

Universal LINC485
INSTALLATION MANUAL
Universal LINC485
Repeater/Router
NEW RELEASE Form 450.20-N20 (702)
TX
RX
TX
RX
SCREEN
P3
P2
GND
5VDC
GND
P2
P3
USHL
LAN
PORT 2
LAN
PORT 1
STATUS
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
S1 LINC
OFF ROUTER
ON REPEATER
MODE SWITCH IS
FOR 50K REPEATER
ONLY. SEE MANUAL
CS OFF 19K2 LAN
CS ON 50K LAN
5VDC
UNIVERSAL
LINC485

2YORK INTERNATIONAL
FORM 450.20-N20 (702)
IMPORTANT!
READ BEFORE PROCEEDING!
GENERAL SAFETY GUIDELINES
During installation, operation, maintenance or
service, individuals may be exposed to certain
components or conditions including, but not limited
to: refrigerants, oils, materials under pressure,
rotating components, and both high and low voltage.
Each of these items has the potential, if misused or
handled improperly, to cause bodily injury or death.
It is the obligation and responsibility of operating/
service personnel to identify and recognize these
inherent hazards, protect themselves, and proceed
safely in completing their tasks. Failure to comply
with any of these requirements could result in serious
damage to the equipment and the property in which it
is situated, as well as severe personal injury or death
to themselves and people at the site.
This document is intended for use by owner-autho-
rized operating/service personnel. It is expected that
this individual possesses independent training that
will enable them to perform their assigned tasks
properly and safely. It is essential that, prior to
performing any task on this equipment, this indi-
vidual shall have read and understood this document
and any referenced materials. This individual shall
also be familiar with and comply with all applicable
governmental standards and regulations pertaining to
the task in question.
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
DANGER indicates an imminently
hazardous situation which, if not
avoided, will result in death or
serious injury.
WARNING indicates a potentially
hazardous situation which, if not
avoided, could result in death or
serious injury.
CAUTION identifies a hazard which
could lead to damage to the ma-
chine, damage to other equipment
and/or environmental pollution.
Usually an instruction will be given,
together with a brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.

YORK INTERNATIONAL 3
FORM 450.20-N20 (702)
CHANGEABILITY OF THIS DOCUMENT
In complying with YORK’s policy for continuous
product improvement, the information contained in
this document is subject to change without notice.
While YORK makes no commitment to update or
provide current information automatically to the
manual owner, that information, if applicable, can be
obtained by contacting the nearest YORK Sales,
Service and Authorized Distributor offices.
It is the responsibility of operating/service personnel
as to the applicability of these documents. If there is
any question in the mind of operating/service person-
nel as to the applicability of these documents, then,
prior to working on the equipment, they should verify
with the owner whether the equipment has been
modified and if current documentation is available.
REFERENCE INSTRUCTIONS
DESCRIPTION FORM NO.
Universal LINC485 Data Sheet 450.20-S30

4YORK INTERNATIONAL
FORM 450.20-N20 (702)
GENERAL SAFETY GUIDELINES.......................................................................................................... 2
SAFETY SYMBOLS ................................................................................................................................ 2
REFERENCE INSTRUCTIONS ............................................................................................................... 3
LIST OF FIGURES .................................................................................................................................. 6
LIST OF TABLES..................................................................................................................................... 6
SECTION 1 – GENERAL INFORMATION............................................................................................... 7
Overview ............................................................................................................................................ 7
Description ................................................................................................................................... 7
Terminology........................................................................................................................................ 8
SECTION 2 – NETWORK TOPOLOGY .................................................................................................. 9
General .............................................................................................................................................. 9
Communication Method ..................................................................................................................... 9
Background vs. Foreground Communications................................................................................. 11
Speed of Communications............................................................................................................... 11
Summary of ISN Network Restrictions ............................................................................................ 11
SECTION 3 – INSTALLATION ............................................................................................................... 13
Installation Guidelines...................................................................................................................... 13
Environment ............................................................................................................................... 13
Electrical..................................................................................................................................... 13
Electrical Noise .......................................................................................................................... 13
Ground/Earth ............................................................................................................................. 14
Protection of Communication Ports ........................................................................................... 14
Cable Specifications ........................................................................................................................ 14
Power Cables ............................................................................................................................. 14
Network and Sensor Cables ...................................................................................................... 14
Summary of Mounting Recommendations ................................................................................ 16
Hardware Configuration ................................................................................................................... 16
DIN Rail Mounting ...................................................................................................................... 16
Panel Mounting .......................................................................................................................... 17
Power Connections .......................................................................................................................... 17
TABLE OF CONTENTS

YORK INTERNATIONAL 5
FORM 450.20-N20 (702)
Universal LINC Connection........................................................................................................ 17
5 VDC Power Supply Connection .............................................................................................. 19
Wire Connections............................................................................................................................. 20
Termination ................................................................................................................................ 22
Switch Settings ................................................................................................................................ 22
Continuity and Isolation Checks ...................................................................................................... 25
SECTION 4 – MAINTENANCE.............................................................................................................. 26
LEDs ................................................................................................................................................ 26
Status LED ................................................................................................................................. 26
Port LEDs ................................................................................................................................... 26
APPENDIX ............................................................................................................................................. 29
Universal LINC485 Specifications ................................................................................................... 29
TABLE OF CONTENTS (CONTINUED)

6YORK INTERNATIONAL
FORM 450.20-N20 (702)
LIST OF TABLES
Table 1 – Recommended Cable Specifications .................................................................................................. 15
LIST OF FIGURES
Figure 1. Universal LINC485 ................................................................................................................................ 8
Figure 2. Typical Network Configurations ........................................................................................................... 10
Figure 3. DIN Rail Mounting Options .................................................................................................................. 16
Figure 4. DIN Rail Removal ................................................................................................................................ 17
Figure 5. USB-Style Patch Cable ....................................................................................................................... 17
Figure 6. Dimensions and Mounting Points ........................................................................................................ 18
Figure 7. Universal LINC485 Components ......................................................................................................... 20
Figure 8. Typical RS485 Connections ................................................................................................................. 21
Figure 9. Terminator Module Power .................................................................................................................... 22
Figure 10. Universal LINC485 DIP Switch Positions........................................................................................... 23
Figure 11. Typical Network Layout with Routers and Repeaters......................................................................... 24

YORK INTERNATIONAL 7
FORM 450.20-N20 (702)
1
GENERAL INFORMATION
SECTION 1
GENERAL INFORMATION
Overview
The Universal LINC485 provides a means to expand
beyond the limitations of the RS485 standard, which
has a maximum of 32 nodes or 4000 ft. (1120 m).
When configured as a router, the Universal LINC485
allows the network to be grouped into subnetworks.
The Universal LINC485 can also be configured as a
repeater. This allows each subnetwork to be extended
by adding segments up to a maximum of three
segments per subnetwork. Each subnetwork can then
accept a maximum of 92 nodes or 12,000 ft.
(3360 m) of cable. Combined with up to 91 routers
on the “base” network, each ISN system has a
capacity of over 8100 nodes.
A variety of mounting configurations provide a very
adaptable device. A 5 VDC Power Supply is available
to power the Universal LINC485. The power supply
also includes many of same flexible mounting
options as the Universal LINCs.
Using a set of DIP switches, the Universal LINC485
may be configured to operate as a repeater or router.
Repeater – Allows an ISN network or subnetwork
to extend beyond 4000 ft. (1220 m) or 32 nodes.
Two repeaters can be used per section for a
maximum length of 12,000 ft. (3660 m) or 92/91
nodes on the main network/subnetwork. The DIP
switch configures the node address of the
repeater. Each port on the Universal LINC485
counts as a node on the network.
Router – Provides a connection point for a subnet-
work. Up to 92 routers may be placed on the
main network for a maximum of 92 subnet-
works. The DIP switch configures the address of
the subnetwork. Each router ascts as a node on
the base network.
The Universal LINC485 requires a 5 VDC power
source. If located within 39 in. (1 m) of a controller
equipped with a USB-style LAN connector, sufficient
power can be supplied through the LAN connection
to operate the Universal LINC485. For older style
controllers, i.e., those not equipped with a USB-style
connector, or if the mounting location is not within
39 in. (1 m) of any controller, the 5 VDC Power
Supply must be used to power the Universal
LINC485.
NOTE: The Universal LINC485 can
only be powered via the LAN connec-
tion on products equipped with a USB-
style connector. Products not equipped
with the USB-style connector must be
powered from the optional 5 VDC Power
Supply.
Description
The Universal LINC485 is a small footprint device
which can be located inside most enclosures or
positioned as a stand-alone device within a building.
The Universal LINC485, as well as the optional
5 VDC Power Supply, includes a housing with a DIN
rail mounting clip. Either device can be removed
from the housing and attached directly to a panel or
enclosure. In addition, if the power supply is used,
the Universal LINC485 can attach to the power
supply in a “piggy-back” style. This single unit can
then be clipped to a DIN rail or attached directly to
an enclosure.
An small enclosure with DIN rail is also available as
a mounting option. This enclosure provides for easy
installation of one Universal LINC and accompany-
ing power supply. The enclosure also works for
mounting other YORK devices, such as a TDCE8 or
TDCE9.
The Universal LINC485 has two ports. Port 1 con-
nects to the base network of the LAN when used as a
router or the lower node addresses in the case of a
repeater. Port 2 connects to either the subnetwork,
when operating as a router, or the higher node
addresses.
A 12-way DIP switch configures the device for
operating mode, device type, and network address.
Two LEDs indicate communication status for each
port. A single SYSTEM STATUS LED indicates the
operating status of the device.

8YORK INTERNATIONAL
FORM 450.20-N20 (702)
GENERAL INFORMATION
Figure 1. Universal LINC485
UNIVERSAL
LINC485
TX
RX
TX
RX
SCREEN
P3
P2
GND
5VDC
GND
P2
P3
USHL
LAN
PORT 2 LAN PORT 1
STATUS
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
Universal
LINC485
Plastic
Housing
DIP
Switches DIN Rail
Mountin
g
Plastic
Housing
Universal
LINC485
S1 LINC
OFF ROUTER
ON REPEATER
MODE SWITCH IS
FOR 50K REPEATER
ONLY. SEE MANUAL
CS OFF 19K2 LAN
CS ON 50K LAN
5VDC
Terminology
The terminology to be used to describe the functions
of this manual are as follows:
Network – This is the entire system of RS485
communications or LAN. It includes subnet-
works and the base network.
Base Network – Sometimes referred to as the
backbone. This is the part of the network that
the routers (formally known as PathFinders) are
attached to. When messages are transmitted
from one subnetwork to another, this is the part
of the network which connects the subnetworks.
It is always identified as subnetwork 99.
Subnetwork – A network can be divided into
subnetworks. Each subnetwork is a branch off
the base network, separated from the base
network by a router. The DIP switch on the
router defines the number of the subnetwork,
which must be between 1 and 92.
Segment – Each subnetwork can be divided further
into segments. The RS485 standard has a
limitation of 32 nodes or 4000 ft. (1200 m). To
extend this, a provision is made to allow the use
of maximum of two repeaters in each subnet-
work. This allows each subnetwork to have a
maximum of three segments.
NOTE: The RS485 standard refers to a
segment as a network.
Electrical Node – Every RS485 driver is an electri-
cal node (load) on the network. The RS485
standard limits each segment to 32 nodes (and
4000 ft./1200 m).
Logical Node – Any software address on the
network. A repeater represents two electrical
nodes but zero logical nodes because the re-
peater can bon be addressed directly.
Repeater – A repeater divides a subnetwork into
segments. It essentially strengthens the signal to
allow it to continue to the next segment. Each
subnetwork is allowed a maximum of two
repeaters, providing a maximum of 96 nodes
and 12000 ft. (3600 m). However, since each
port of the repeater is a node (plus one for the
router), the maximum number of logical nodes
which can be installed on a subnetwork is 91.
The orientation of the repeater nodes is very
important when operating using 50 kbaud
communication. To reduce traffic on the network
it uses a filtering method. Refer to the Switch
Settings in Section 4 for additional information.
Router – A router divides the network, or LAN, into
subnetworks. The router connects one port to the
base network as a single node. The other port
connects to the subnetwork as a single node.
Using repeaters on the base network, this allows
a maximum of 92 routers on the base network to
allow 92 subnetworks.
Port 1 of the router must be oriented to the base
network for the router to properly recognize the
subnetwork.

YORK INTERNATIONAL 9
FORM 450.20-N20 (702)
2
NETWORK TOPOLOGY
SECTION 2
NETWORK TOPOLOGY
General
The full range of ISN control products (UDC, TDCE,
FDC, etc.) are able to reside on a Local Area Network
(LAN) with full peer-to-peer communications. The
network architecture supports a potential of 8372
controllers, each one able to communicate to any
number of other controllers on the LAN and outside
of the LAN via a modem to remote facilities.
The entire building or complex may be linked to-
gether to form a Building Automation System (BAS)
or Building Management System (BMS).
YORK’s proprietary network protocol is the Inte-
grated System Network (ISN). The ISN network is
RS485, utilizing ethernet principles and background
and foreground communication levels. The data
transfer speed is either 19.2 or 50 kbaud, depending
upon the version of software used. Newer versions of
software allow transfer speed selection to be back-
ward-compatible with older networks.
All ISN controllers have the ability to communicate
directly to all other ISN controllers or devices on a
network or any subnetwork – this is known as “peer
to peer” communication.
Due to the volume of traffic which may be present on
a network, it is often beneficial to divide the network
into subnetworks. Local messages remain contained
within the subnetwork. Full network communication
is then limited to only the data relevant to the other
subnetworks, greatly reducing the network traffic.
A variety of devices may be attached to the ISN
network to enhance usability and functionality. Some
of these devices are:
• The Universal LINC485 configured as a repeater
amplifies the network signal to extend the
physical length of a network or subnetwork
cable. They also extend the number of ISN
controllers by segmenting the network.
• The Universal LINC485 configured as a router
separates subnetworks from the main network.
• The LINC Fiber Optics interfaces the ISN
network with fiber optic cable.
• The LINC Guardian manages the remote trans-
mission of multiple alarms from the ISN net-
work.
• The Universal LINC232 allows communication
to RS232 devices such as modems, serial
printers, terminals or PC’s.
NOTE: The PC must be running a
VT100 emulation program, York Icon
Engineering Software (IcE) or York
Facility Manager for Windows™
software.
Physically, a twisted-pair (2-core) shielded cable is
daisy-chained between the network devices.
Communication Method
The ISN network communicates on a “contention”
basis. Every ISN controller on the network can
transmit a message but only the designated receiving
controller(s) acknowledge receipt. Each receiving
controller sends a receipt back to the sending control-
ler as acknowledgment of the transmission. A calcu-
lated checksum is used to verify the integrity of each
message.
If no acknowledgment is received, the message is
automatically retransmitted up to 3 times. After 3
attempts to communicate, the sending controller
starts to increase the amount of time between trans-
missions. The time increases in intervals of 10
seconds, 15 seconds, 30 seconds, 1 minute, 15
minutes, 30 minutes and then 1 hour if unsuccessful.
Retransmission of the message then occurs automati-
cally every hour until receipt is acknowledged. No
message is ever lost, although message delivery may
be slowed on high traffic networks if not segmented
properly.
If an external device is connected to the RS232 port,
such as a modem through the Universal LINC232,
the retransmission interval between failed communi-
cations changes from 1 minute to 15 minutes to 30
minutes to 1 hour, 2 hours, 4 hours and then 6 hours.
Retransmission of the message then automatically
occurs every 6 hours until receipt is acknowledged.

10 YORK INTERNATIONAL
FORM 450.20-N20 (702)
NETWORK TOPOLOGY
Figure 2 – Typical Network Configurations
YORK
TM
ISN
Ò
Controller
UNIVERSAL LINC485
Universal LINC485
w/ Power Supply
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Repeater
Router
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Repeater
YORK
TM
ISN
Ò
Controller
Controller
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Router
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Repeater
Controller
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Repeater
Controller
UNIVERSAL LINC485
Universal LINC485
w/ Power Supply
Repeater
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Router
UNIVERSAL
LINC485
Universal LINC485
w/ Power Supply
Repeater
Maximum of 30 nodes
and 4000 ft. (1220 m)
UNIVERSAL
LINC232
Facility Manager
Universal LINC232
USB Cable
Universal LINC232
w/ Power Supply
UNIVERSAL
LINC232
Modem
Printer
Base Network
Subnetwork
Segment
Maximum of 91 nodes
and 12,000 ft. (3660 m)
Base Network Base Network
ControllerController
Universal LINC232
w/ Power Supply
UNIVERSAL
LINC232

YORK INTERNATIONAL 11
FORM 450.20-N20 (702)
2
NETWORK TOPOLOGY
Background vs. Foreground
Communications
The ISN network uses both “Background” and
“Foreground” communication to ensure essential data
is transmitted without delay.
Background communication supports multiple source
messages at the same time, although the speed of
communication may be affected if large quantities of
data are transmitted around the network.
Examples of background communication are:
• Automatic transfer of digital states and analog
values between ISN controllers.
• Analog and Digital alarms to a Universal
LINC232 connected to a PC running the York
Facility Manager for Windows™ software.
• Using a PC running the York Facility Manager
for Windows™ software to read and write data
to and from an ISN controller via a Universal
LINC232.
• Analog and Digital alarms to a LINC Guardian.
Only one foreground communication to a specific
ISN controller can occur at any one time. A “busy”
message is displayed if the ISN controller is already
communicating with another device using this
method. Background communication can occur
simultaneously with foreground communication.
Examples of foreground communications are:
• Manual communications between ISN control-
lers using the optional keypad/display or Win-
dows™ HyperTerminal software running on a
PC connected to the RS232 port of an ISN
controller.
• Using a PC running the YORK Facility Manager
for Windows™ software to write data into an
ISN controller via a Universal LINC232.
• Printing of Analog and Digital alarms to a
Universal LINC232 connected to an RS232
printer.
• Using a PC running the YORK IcE to Save or
Load an ISN controller Configuration via a
Universal LINC232.
• Using a PC running the YORK Facility Manager
for Windows™ to Save or Load an ISN control-
ler Configuration via a Universal LINC232.
Speed of Communications
The ISN network communicates at either a 19.2 or 50
kbaud rate. The Universal LINC232 is switch se-
lected to communicate at 4800, 9600, or 19,200
(19k2) baud rates through the serial RS232 port.
The typical response time between ISN controllers
for automatic transfer of data or alarms is
100 milliseconds.
Each Universal LINC485 Repeater and Router
increases the typical response time by
100 milliseconds.
Summary of ISN Network Restrictions
• The maximum single length of a network or
subnetwork is 4000 ft (1200 m). This can be
extended to 12,000 ft (3600 m) using two
Universal LINC485 devices configured as
repeaters. This provides a maximum combined
network end-to-end length of 36,000 ft. (10,800
m).
• A Universal LINC485 configured as a repeater is
required every 4000 ft. (1200 m) or 32 nodes. A
node is any device which uses an RS485 driver,
such as an ISN controller, Universal LINC485 or
Universal LINC232.
• The maximum number of nodes on a main
network is 92 plus two Universal LINC485
devices configured as repeaters. A maximum of
91 plus two Universal LINC485 devices are
allowed on a subnetwork.
• When the main network or subnetworks are
extended between different buildings, the
ground/earth voltage of the buildings must be at

12 YORK INTERNATIONAL
FORM 450.20-N20 (702)
NETWORK TOPOLOGY
the same potential. If this cannot be guaranteed,
the network connection between building(s)
should be a fiber optic cable with a LINC Fiber
Optic device fitted in each building to interface
onto the ISN network.
• The LINC Guardian should be used where it is
expected multiple alarms will be transmitted via
a modem to a remote Facility Manager for
Windows™ or multiple destinations. It acknowl-
edges receipt of any alarm to a transmitting ISN
controller and can store up to 20 alarms in each
of the 8 standard ISN Alarm Classes.
• All node numbers connected to the LAN Port 1
of a Universal LINC485 configured as a repeater
must be lower than the node address of the
repeater. All node numbers connected to the
LAN Port 2 of a Universal LINC485 configured
as a repeater must be higher than the node
address of the repeater.
• Each ISN controller must have the node switch
set to a unique address number between 1 and 98
per subnetwork. The node switches are used for
filtering messages at a Universal LINC485
configured as a repeater which also must have a
unique node number. The node switches on a
Universal LINC485 configured as a router set
the subnetwork address and must be between 1
and 98, with the main network automatically
being network address 99. Communications
between ISN devices on the same network or
subnetwork(s) should use network 0 (zero) as the
network address.

YORK INTERNATIONAL 13
FORM 450.20-N20 (702)
3
INSTALLATION
SECTION 3
INSTALLATION
Installation Guidelines
This manual assumes the installer is competent in
environments with moving machinery, and is able to
recognize and protect against any inherent hazards,
such as, but not limited to, refrigerants, oil, corrosive
chemicals or gases, materials under pressure, rotating
parts, and both high and low voltages. Each of these
items has the potential, if misused or handled im-
properly, to cause bodily injury or death.
It is the obligation and responsibility of the operating/
service personnel to identify and recognize inherent
hazards, protect themselves, and proceed safely in
completing their tasks. Failure to comply with any of
these requirements could result in serious damage to
the equipment, as well as severe personal injury or
death. In addition to following standard local, state
and country codes and procedures, it is recommended
that a lockout procedure be used to prevent inadvert-
ent start up of equipment during installation and
maintenance procedures.
All wiring should be carried out in a safe and neat
manner and should always comply in all respects to
the latest edition of any local, state or country codes
that may be applicable. The wiring should be in-
stalled in a manner that does not cause a hazard and
is protected against electrical and mechanical dam-
age.
Care should also be taken when mounting enclosures
so access to other equipment within the vicinity is not
restricted.
Environment
YORK ISN equipment must be installed in an
environment that is protected from the direct influ-
ence of the elements and is within the following:
Temperature: 32 to 122° F (0 to 50° C).
Humidity: 10% to 95% non-condensing.
The unit should never be mounted outside the con-
fines of a building. If this cannot be avoided, it may
be mounted inside an enclosure rated at IP65/NEMA
4X or greater. In addition to protection against the
elements, the enclosure must be capable of maintain-
ing the circuit boards at the required temperature and
humidity. This may require the addition of a fan or
heater to maintain the temperature and humidity
inside the enclosure.
WARNING: Never install the compo-
nents in an element that does not
meet the minimum environmental
requirements.
Electrical
Refer to the table titled Recommended Cable Specifi-
cations to determine suitable wire sizes to connect the
line voltage feed the devices. The line voltage power
source should be “clean,” separately fused (for either
115 or 230 VAC), and isolated, (using a control
transformer) from other equipment in the plant room
that may generate EMI interference.
Electrical Noise
All electrical equipment has the risk of being affected
by external electrical noise. This noise may take the
form of Radio Frequency Interference (RFI) or
Electro-Magnetic Interference (EMI). To minimize
the affects of electrical noise, mount equipment in a
location away from all possible RFI and EMI
sources. These include high voltage cables, high
voltage transformers, breakers, and high frequency
drives.
Keep line voltage switching loads a minimum of 6 in.
(152 mm) away. Any high voltage equipment, such as
transformers, high horsepower electric motors or high
frequency drives, should be kept a minimum of 30 ft
(9.1 m) away.
All high voltage wiring (>75 volts) must be run in
conduit and kept separate from low voltage commu-
nications wiring. This greatly reduces network
communication problems.

14 YORK INTERNATIONAL
FORM 450.20-N20 (702)
INSTALLATION
Ground/Earth
All ISN controllers are de-
signed to use the building
ground (earth) as a reference
point. This electrical orienta-
tion helps maintain all elec-
tronic components communi-
cating to the controller within
their specified voltage limits.
CAUTION: The controller must
connect to a true building ground.
Failure to do so may cause equip-
ment damage and will void all
warranty claims.
Electrical grounding also protects network devices
from the effects of lightning strikes. When lightning
strikes near an ISN installation, it alters the potential
of the building’s ground. If an ISN controller has
been properly grounded, it will respond to this
change much faster than if the ground connection is
inadequate. Controllers that are poorly grounded
provide a lower resistance path through their signal or
power connections than the actual ground of the
building. Under these circumstances large surge
currents may flow through the controller and result in
component failure.
An example of a poor ground would be a galvanized
steel cold water pipe. As the pipe corrodes it no
longer acts as a true ground. The corrosion acts as an
insulator, raising the potential of the pipe with respect
to earth ground.
YORK strongly recommends that the building’s
ground be checked prior to the start of the installa-
tion. The power distribution panel should be checked
to ensure that it is not connected to a corroded or
galvanized pipe. As a minimum, it must be connected
with 14 AWG wire.
Protection of Communication Ports
The most common circuits damaged are communica-
tion components, such as RS485 and RS232 drivers.
When using RS485 technology it is possible that
electrical disturbances, such as voltage spikes, can
damage a circuit board. Newer ISN controllers
include tranzorbs at the RS485 ports to protect
against damaging electrical spikes and stray voltage.
It is recommended that all devices on an RS485
network be equipped with protection against electri-
cal disturbance.
Cable Specifications
Power Cables
CAUTION: Aluminum wire is
absolutely not acceptable.
The power cable should be at least an 18 AWG
copper wire rated for 10 amps per core at 250 volt
AC. If the power cable uses three conductors, the
ground conductor must be, as a minimum, the same
size with the same current carrying capacity as the
live and neutral conductors.
All ISN devices should be wired to a non-switched,
fused spur to prevent the power from being turned off
accidently. The supply spur should be protected with
a either a suitable fuse or an approved power breaker.
The input line supply voltage should be fused. For a
115-volt line voltage use a 10-amp fuse or breaker.
For a 230-volt line voltage use a 5-amp fuse.
The fuse or breaker should be located within a
reasonable distance to the controller so the power can
be turned off any time the unit is serviced.
Network and Sensor Cables
Cables come in many types. A balance between cost
of the wire and the simplicity of the project deter-
mines the variety of wires used. Quite often a single
type of wire or cable may be used for nearly all
wiring on a project, even though it greatly exceeds
the requirements for a particular sensor or applica-
tion.
GRD.
RAM 5

YORK INTERNATIONAL 15
FORM 450.20-N20 (702)
3
INSTALLATION
Table 1 – Recommended Cable Specifications
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The table titled Recommended Cable Specifications
provides a guide to one major wire manufacturer’s
product line. These are the minimum requirements.
Use them as a guide. If questions arise, most wire
supply companies can cross-reference between
manufacturers and help determine if a particular wire
meets the requirements.
NOTE: Be sure cables are securely
attached without tensile load.

16 YORK INTERNATIONAL
FORM 450.20-N20 (702)
INSTALLATION
Summary of Mounting Recommendations
•Always mount ISN devices inside the confines
of a building or inside an enclosure suitably
rated for exposure to weather.
•Never mount ISN devices under or beside pipes
carrying water or chemicals.
•Never mount ISN devices near high voltage
cables, high voltage transformers or breakers, or
close to high frequency drives.
•Never mount ISN devices in a location where
the environment could be outside the specified
operating specifications.
•Never mount ISN devices on a vibrating surface
without first employing some form of mechani-
cal dampening.
Hardware Configuration
DIN Rail Mounting
The Universal LINC485 provides several different
options for installing within a network. The LINC is
shipped in a plastic housing with a DIN rail mounting
clip. The optional 5 VDC Power Supply also uses the
plastic housing with DIN rail mounting clip.
To attach either device, hook the lip of the clip over
the edge of the DIN rail. Press the bottom of the
device until the clip “snaps” over the lower lip of the
DIN rail.
To remove, pull the lower lip of the clip, which is
exposed below the housing, down until the lower lip
of the DIN rail is clear. Tilt the device and lift it off
the top lip of the DIN rail.
In some situations it may be desirable to remove the
Universal LINC485 from the housing and attach it to
the 5 VDC Power Supply. The housing is modular
and can be separated by using a screwdriver pressed
Figure 3. DIN Rail Mounting Options
Plastic Housing
DIN Rail
Universal LINC
Power Su
pp
l
y
DIN Rail
Universal LINC

YORK INTERNATIONAL 17
FORM 450.20-N20 (702)
3
INSTALLATION
between sections. When the Universal LINC485 is
removed from the housing it may be attached to the
5 VDC Power Supply using the two M3 x 5 screws
located on the top surface of the power supply. The
assembled unit may then be clipped to a DIN rail.
Panel Mounting
When a DIN rail mount is not desired, the Universal
LINC485 may be removed from the plastic housing
by separating the sections of the housing. The Univer-
sal LINC may then be attached directly to a suitable
panel using 1/8 in. (4 mm) screws. Likewise, the
Power Supply may also be removed from the plastic
housing and attached directly to a suitable panel. The
option to attach the Universal LINC485 to the top of
the 5 VDC Power Supply also applies to panel
mounting of the power supply.
Refer to the figure titled “Dimensions and Mounting
Points” for hole spacing requirements.
Power Connections
Universal LINC Connection
Because the Universal LINC is a small device, power
can be drawn from a controller if located within
39 in. (1 m) of the controller. An additional pair of
wires connects between the controller and Universal
LINC.
An alternative method of connecting a Universal
LINC is to use a patch cable (Part No.
371-01429-000). This patch cable takes advantage of
the additional, USB-style connector on the newer
controllers. The patch cable combines the power and
communication wires into a single cable that doesn’t
require disconnection of the existing network cables
from the standard LAN connector.
If the Universal LINC is not located within 39 in.
(1 m) of a controller, a separate power supply must be
used. The terminals GND and 5VDC at the LAN port
should be connected directly to the 5 VDC Power
Supply as shown in the figure titled “Typical RS485
Connections.”
Figure 4. DIN Rail Removal
Figure 5. USB-Style Patch Cable
SCREEN
P3 P2
GND
5VDC
SCREEN
WHITE
GREEN
BLACK
RED
USB-style Plug
Patch
Cable
Patch Cable
Color Codes
Universal LINC
Terminations

18 YORK INTERNATIONAL
FORM 450.20-N20 (702)
INSTALLATION
Figure 6. Dimensions and Mounting Points
3.93 in. (100 mm)
2.75 in. (70 mm)
UNIVERSAL
LINC485
TX
RX
TX
RX
SCREEN
P3
P2
GND
5VDC
GND
P2
P3
USHL
LAN
PORT 2 LAN PORT 1
STATUS
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
2.48 in. (63 mm)
2.32 in. (59 mm)
0.16 in.
(4 mm)
0.16 in.
(4 mm)
0.16 in.
(4 mm)
0.16 in.
(4 mm)
A
C
C
B
B
A
0.58 in.
(15 mm)
0.58 in.
(15 mm)
0.51 in.
(13 mm)
0.51 in.
(13 mm)
2.95 in. (75 mm)
on DIN rail
1.77 in.
(45 mm)
2.16 in. (55 mm)
on DIN rail
0.98 in.
(25 mm)
A – Mounting Hole for Universal LINC485; 0.16 in. (4 mm) diameter
B – Mounting Hole for Power Supply; 0.16 in. (4 mm) diameter
C – 2.5M x 5 stud
f
or mountin
g
Universal LINC485 on Power Su
pp
l
y
Optional Power Supply
Universal
LINC485
Power Supply
Mounting
Plate
3.66 in. (93 mm)
S1 LINC
OFF ROUTER
ON REPEATER
MODE SWITCH IS
FOR 50K REPEATER
ONLY. SEE MANUAL
CS OFF 19K2 LAN
CS ON 50K LAN
2.48 in. (63 mm)
5VDC

YORK INTERNATIONAL 19
FORM 450.20-N20 (702)
3
INSTALLATION
5 VDC Power Supply Connection
The 5 VDC Power Supply is supplied as either 115 or
230 ±10% volts AC at 50/60 Hz frequencies. Maxi-
mum output of the power supply is 300 mA at
5 volts DC.
A properly color-coded wire must be obtained locally
to conform to local, state and country regulations for
connection of the 115/230 VAC line voltage. Two
leads, red and black, are attached to the power supply
to connect to the Universal LINC.
DANGER: Disconnect any line
voltage power supply at the source
before attaching wiring to prevent
possible electrocution.
The line voltage power supply should be wired to a
non-switched fused spur to prevent the power from
being turned OFF accidentally. A fuse or breaker
rated at 5 amps (115 VAC input) or 3 amps (230 VAC
input) should protect the controller from overload.
The 5 VDC Power Supply requires a 3-conductor,
power cable for the line voltage power supply, similar
to the one used by most computers. It may use a
typical plug in connector or have bare wire at the
other end (for connection to a circuit breaker box). It
is recommended that the line voltage supply cable be
installed within suitable conduit if it is run outside
the enclosure. Ensure that all wiring meets local, state
and country codes, as well as follows NEC recom-
mendations.
To install the Power Supply Module:
DANGER: Always disconnect the
power before working inside or
around an electrical enclosure.
1. Mount the 5 VDC Power Supply using either
the DIN rail or panel mounting method.
2. Attach the black power lead from the 5 VDC
Power Supply to the GND terminal and the red
power lead to the 5 VDC terminal of the LAN
port.
3. Install conduit, if necessary to meet code,
between the device and an appropriate line
voltage power supply at a circuit breaker or
fuse box.
4. Install a 5 amp (115 volt line voltage) or 3 amp
(230 volt line voltage) fuse or circuit breaker in
the line voltage spur. Be sure to place a label on
the circuit breaker indicating the Universal
LINC power shut-off point.
5. Plug the line voltage cable into the receptacle
on the 5 VDC Power Supply. The plug is keyed
for correct orientation.
6. Connect the line voltage cable into a standard
receptacle or attach each conductor to the fuse
or circuit breaker according to regulations.

20 YORK INTERNATIONAL
FORM 450.20-N20 (702)
INSTALLATION
Wire Connections
The Universal LINC485 has one port labelled LAN
PORT 1 and the other LAN PORT 2. Both ports use
the RS485 standard. Although the connections are the
same, the orientation of the Universal LINC485 in
respect to the network is critical:
• When operating as a repeater, the node addresses
on the LAN PORT 1 must be lower than the
node addresses on the LAN PORT 2 side.
• When operating as a router, the main network
must be connected to LAN PORT 1 and the
subnetwork connected to LAN PORT 2.
The RS485 standard uses a twisted-pair shielded
cable to transfer data. A 5 volt DC signal is used as
the signal and, if located within 39 in. (1 m) of a
controller (signal generator), can be used to power the
Universal LINC.
An optional patch cable (Part No. 371-01429-000) is
available to simplify connection to the LAN. This
patch cable allows quick connection to the LAN
when using the newer controllers, such as the TDCE
and UDC.
To connect the patch cable to a newer style controller,
simply insert the USB-style plug into the controller.
At the Universal LINC end, remove the standard
screw terminal connector and attach the patch cable.
The patch cable is pre-wired to simplify connection.
The figure titled “Typical RS485 LAN Connections”
provides shows the different methods for connecting
the LAN. Note the different methods for connecting
the GND and 5VDC terminals. Power is always
connected to the LAN PORT 1 side.
UNIVERSAL
LINC485
TX
RX
TX
RX
SCREEN
P3
P2
GND
5VDC
GND
P2
P3
USHL
LAN
PORT 2
LAN
PORT 1
STATUS
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
Network
Connection
Network or
Sub-network
Connection
System Status LED (Red)
ON Unit OK
OFF Unit failure or loss or power
CONTINUOUS FLASH – Node
address set to zero (0).
SINGLE FLASH – Indicates device
settings are reset.
Network or Sub-network
Status LEDs
Red LED (TX) ON – LINC
is transferring data.
Green LED (RX) ON – LINC
is receiving data.
Network Status LEDs
DIP Switches
Red LED (TX) ON – LINC
is transferring data.
Green LED (RX) ON – LINC
is receivin
g
data.
S1 LINC
OFF ROUTER
ON REPEATER
MODE SWITCH IS
FOR 50K REPEATER
ONLY. SEE MANUAL
CS OFF 19K2 LAN
CS ON 50K LAN
5VDC
Figure 7. Universal LINC485 Components