Operator Interfaces SD
SYSTEM CONNECTION
5
Connection and Wiring
Stand Alone and Network Connection
As previously described, when the System Manager is to be connect-
ed to a Stand Alone system, a 12-foot cable with modular connectors
on one end and stripped wire ends on the other end is provided for
this purpose. This is used to facilitate connecting communications
and power wiring to the Modular System Manager from a 24 VAC
power source and to the HVAC unit controller communication wir-
ing terminals. If the supplied cable wire is not long enough for your
installation, a standard modular cable of the correct length can be
purchased through AAON and one of the modular connectors can
Figure 2: Modular System Manager SD Connection and Wiring Details
be cut off to allow for the transformer and communication terminal
wiring connections. It is recommended that you do not splice the
communications wire if at all possible. The transformer should be
rated at 6 VA minimum power output.
Alternatively, 2-conductor, twisted pair with shield cable can be used
to wire from the RS-485 terminal block on the back of the Modular
System Manager to the Controller’s communicaton terminal. All
controllers on the entire Networked System can be programmed
from one controller.
See
Figure 2
below for typical connection information.
Use Supplied Modular Cable
With Stripped Ends For
Connection To Terminal Block
And Transformer
WHITE (T)
DRAIN WIRE (SHLD)
BLACK (R)
RED (24 VAC)
BROWN (GND)
GREEN (GND)
Class 2 Transformer
Rated For 6 VA Minimum
Controller Board
T
SHLD
R
Modular System
Manager SD
Back View
NOTE: For Stand-Alone
Installations (No CommLink
or MiniLink), All TERM
Jumpers Must Be ON.
For All Applications With
CommLink(s) Or MiniLink(s),
All Jumpers Must Be OFF.
4
GB
Line
Voltage
24VAC
R
SH
T
R
SH
T
R
SH
T
R
SH
T
All Comm Loop Wiring Is
Straight Through
Local Loop
RS-485
9600 or
57,600 Baud
24VAC Transformer
(By Others)
Rated for 6 VA
GND
Controller Board
T
SHLD
R
