Technical Instructions
RWD62U Universal Controller
Document Number 155-737
January 14, 2005
Software Tool
An optional, user-friendly, Windows® 95 (or later) based software tool for controller
application selection and parameter adjustment is available. It provides you with a
printout of the controller settings. This tool allows controller programming prior to
installation.
Functions
Controller Type
The RWD62U is a stand-alone universal controller, which performs both primary and
auxiliary control functions. The respective mode is defined by entering the
corresponding configuration and setting parameters via the push buttons on the
controller or the software tool.
Main Functions
The RWD62U controller can be programmed as follows:
•
One sequence:
Y1 or Y2
Reverse or direct acting
•
Two sequences:
Y1 and Y2
Reverse and direct acting or
Y1 and Y2
Reverse and reverse acting or
Y1 and Y2
Direct and direct acting
NOTE:
Direct Acting – As air temperature increases, the control output increases.
Reverse Acting – As air temperature increases, the control output
decreases.
TH0599R3
= TEMPERATURE SENSOR
= AIR DAMPER ACTUATOR
= HEATING COIL
= COOLING COIL
= HEATING OR COOLING COIL (TWO-PIPE)
= FAN OR PUMP
= TIME CLOCK
= REMOTE SET POINT UNIT
= OUTSIDE AIR SENSOR
+
+
-
-
Figure 1. Frequently Used Symbols in Application Drawings.
TH0786R1
Y1
O
u
tput
V
o
lt
age
Setpoint
Setpoint
Temp.
Figure 2. One Sequence Heat, Direct
Acting or Reverse Acting
(Application 10 to 19).
Y1
O
u
tput
V
o
lt
age
Temp.
Y2
Setpoint
TH0787R1
Figure 3. Two Sequence Heat, Two Direct
Acting or Two Reverse Acting Sequences
(Application 20 to 29
).
Y1
Setpoint
Temp
Y2
O
u
tput
V
o
lt
age
TH0788R1
Setpoint
Figure 4. One Direct Acting Heat and One
Direct Acting Cool or One Reverse Acting
Heat and One Direct Acting Cool
Sequence
(Application 30 to 39).
TH0789R1
Y1
Temp.
O
u
tput
V
o
lt
age
Setpoint
Setpoint
Figure 5. One Direct Acting Cool or One
Reverse Acting Cool Sequence
(Application 40 to 49).
Page 4
Siemens Building Technologies, Inc.
