YORK INTERNATIONAL
21
FORM 450.20-N20 (702)
3
INSTALLATION
TX
RX
SCREEN
P3
P2
GND
5VDC
LAN
IN
STATUS
NODE SWITCH
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
Any ISN Controller
w/ 5 VDC Power Supply
Shield
(Open)
TO NEXT
NO
DE
LINC
Power
Supply
Black
Red
5 VDC
GND
P2
P3
USHL
LAN
PORT
Controller
Shield
(Open)
5 VDC
GND
P2
P3
USHL
LAN
PORT
LINC
5 VDC
GND
P2
P3
USHL
LAN
PORT
Controller
TX
RX
SCREEN
P3
P2
GND
5VDC
LAN
IN
STATUS
NODE SWITCH
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
TO NEXT
NO
DE
Shield
(Open)
Shield
(Open)
New Controller Equipped
with USB-style Connector
w/ 5 VDC from LAN
TX
RX
SCREEN
P3
P2
GND
5VDC
LAN
IN
STATUS
NODE SWITCH
S1
MODE
1
2
4
8
16
32
64
CS
OFF ON
New Controller Equipped
with USB-style Connector
using Patch Cable
Controller
TO NEXT
NODE
TO NEXT
NODE
Shield
(Open)
TO NEXT
NO
DE
TO NEXT
NO
DE
The RS485 connection should always have incoming
and outgoing LAN wiring connected to the LAN
PORT 1. This allows the network to remain con-
nected if a device or subnetwork is disconnected. The
only exception is when the Universal LINC485 is
operating as a repeater.
NOTE: When connecting the patch
cable with USB-style connector to the
newer controllers, this continuation-
type of wire connection is made in the
controller.
When making RS485 connections, terminate the
cable shield (screen) at one end only to a ground. The
other end should remain open (unconnected). Ideally,
the shield continues as close as possible to the
connection point unless the device is inside an
enclosure. The Universal LINC485 provides a screw
terminal to ground the shield labelled SCREEN.
Inside an enclosure, the shield should be connected to
a ground as soon as possible after the shield enters
the enclosure. In this case, do not use the SCREEN
(or USHL if connecting to a controller) terminal but
connect to the closest ground/earth point.
Figure 8. Typical RS485 LAN Connections
