Solid-State Staging Controllers Series SC and SU0 pages
9408 Ath PowerControl:Layout 1
12/17/08
11:59 AM
Page 6
Solid-State Staging Controllers Series SC and SU
The Athena SC and SU controllers are available for
heat or heat/cool applications (SC and SU with Type A
Input Card) and boiler applications (SC and SU with
Type B Input Card). The controller accepts current,
voltage or resistance input, and provides solid state
output stages.
▲ Up-Down or Circular Mode
▲ Optically Isolated Input
▲ Logic Status Lights
▲ Field Changeable, Plug-in Circuit Boards
▲ 10-Stage Capacity
▲ Fused Output Stages
Ordering Information
S
Mode
Input
Heat Steps
Cool Steps
Code
A = 4 to 20 mA dc, or 135 ohms
B = Thermistor Input
D = 12 to 20 mA
Specify
NO (03) to (10)
Specify
NO (03) to (10)
C = Circular
U = Up-Down
NOTE
Total number of Heat and Cool steps cannot exceed 10.
Other inputs, delays and options available, consult factory.
Example:
SU-A-08-02 – Series (S) staging controller (U) up-down mode (A) 4-20 mA, or 135Ω ,
10 sec standard input, (8) heat stages, (2) cool stages.
Determine desired mode of operation, i.e., circular, up-down,
type of input to stager and number of steps to be switched.
CIRCULAR MODE: Recommended for heating only application.
UP-DOWN MODE: Required for heating/cooling applications
and priority load sequencing.
40
Total Number
of Steps
OPTIONS
00 =
01 =
02 =
None
Time Delay
3 sec
Time Delay
60 sec