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