Siemens RWD62U, Технические инструкции, Страница: 7 / 11

RWD62U Universal Controller Technical Instructions
Document Number 155-737
January 14, 2005
Winter/Summer Operation
TH0797R1
X1 Y2 Y1
Temp.
Summer
Setpoint Winter
Setpoint
Y
T
X2
Figure 14. Winter/Summer Operation.
A digital switch or analog input between
terminals X2 and M will implement
winter/summer changeover.
When adjusting setpoints, the heating
setpoint must be less than the cooling
setpoint.
Digital changeover
When the contact is closed, summer
operation is selected. Reverse acting
output (Y1 only) is set to direct action
(cooling).
Analog changeover
Summer operation is selected when the
X2 input exceeds the setpoint Reverse
acting output (Y1 only) is set to direct
action (cooling).
Day/Night Setpoint
TH0798R1
X1 Y2 Y1
Temp.
Y
D1
Figure 15. Day/Night Setpoint.
A contact between terminals D1 and M
can be used to implement setpoint
changeover for day/night operation.
When the contact is open, the setpoints
for day operation are selected.
When the contact is closed, the setpoints
for night operation are selected.
During the night mode, the following
auxiliary functions are disabled: remote
setpoint, absolute/relative limiter,
setpoint compensation and maximum
priority.
Mechanical Design
Protective Housing
ARG62.21
•
This UL-approved plastic housing protects the controller when mounted outside a
control panel, such as on ducts, walls and in mechanical rooms. This housing
also prevents inadvertent contact with voltage supplying parts such as the
connecting terminals.
•
The RWD62U clips into the housing.
•
The cable entries are located at the top and the bottom of the ARG62.21
housing.
•
The front has an opening for the LCD display and the programming buttons.
Terminals
Plug-in screw terminals
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