Cycle Control Unit
G32A-EA
Used in Combination with the G3PA SSR
to Enable High-precision Temperature
Control
• Uses cycle control to achieve power control with little noise.
• Used in combination with the G3PA SSR to connect to
single- and three-phase loads.
• Three types of input method available: Internal adjuster,
external adjuster, or DC signals from 4 to 20 mA.
• Streamline design. Both DIN-track mounting and screw
mounting possible.
• Uses linking terminals for close mounting with G3PA SSR.
• Built-in isolation transformer.
• Power supply range: 100 to 240 V.
Ordering Information
Name
Cycle Control Unit
Yes
Isolation transformer
Rated power supply voltage
100 to 240 VAC
G32A-EA
Model
Application Examples
•
•
•
•
Electric furnaces
Thermostats
Food-processing machinery
Drying machinery
•
Molding equipment
•
Heating devices
•
Other applications requiring high-precision temperature control
Specifications
■
Ratings
Item
Rated power supply current 50 Hz
60 Hz
Output signal
Input signal
100 (200) VAC
120 (240) VAC
100 (200) VAC
120 (240) VAC
15 mA max. at 12 VDC
±15%
(at 25°C)
Current signal: 4 to 20 mA (input impedance: 352
Ω)
(see note)
Internal adjuster: 50 kΩ (1/4 W)
External adjuster: 50 kΩ (1/4 W)
0 to 100%
0.2 s
2 G3PA Relays max.
40 mA max.
Specifications
Output cycle rate
Control cycle
Number of operable units
Note:
The values given for current signals are for operation at room temperature.
Cycle Control Unit
G32A-EA
1
■
Characteristics
Item
Power supply voltage range
Dielectric strength
Vibration resistance
Shock resistance
Storage temperature
Ambient operating temperature
Ambient operating humidity
Weight
75 to 264 VAC
1,500 VAC, 50/60 Hz for 1 minute (between AC power supply and input/output terminals)
10 to 55 Hz, double amplitude of 0.75 mm
2
(when mounted to DIN track)
300 m/s
2
(approx. 30 G)
-30 to 100°C (with no icing or condensation)
-30 to 80°C (with no icing or condensation)
45% to 85%
Approx. 100g
Specifications
Engineering Data
2
Cycle Control Unit
G32A-EA
Nomenclature
The following diagram shows the terminals, adjusters, and switches
of the G32A-EA.
■
Setting the Input Method
Select external adjuster, internal adjuster, or control current as the
input method using the selection switches as shown in the following
table.
Control method
External adjuster
Input selection slide switches
Internal adjuster
(see note 2)
Control current
Note: 1.
The input selection slide switches are factory set to internal
adjuster input. Change the setting of the switches for the in-
put method required.
2.
When using the internal adjuster, use with the input termi-
nals (C
1
, C
2
) in the open state. Internal setting is not possi-
ble if there is a Temperature Controller or other device
connected to C
1
or C
2
.
Cycle Control Unit
G32A-EA
3
■
Cycle Control Setting Method
The output cycle rate can be adjusted using the internal or external adjuster. For current control, refer to the Output Cycle Rate vs Control Current
graph on page 2.
Note:
When using the internal adjuster or external adjuster, it is necessary to set the input control method in the way described previously.
■
Output Power Resolution
When power is controlled using the Cycle Control Unit, the output
resolution (minimum variation value) changes depending on the
power supply frequency. (SSR with zero cross function.)
Control cycle
0.2 s
5%
Output power resolution
50 Hz
4.2%
60 Hz
■
Cycle Control Method
The power on the load side can be controlled by adjusting the num-
ber of cycles within the control cycle of 0.2 s and repeating this con-
trol cycle.
4
Cycle Control Unit
G32A-EA
Operation
■
Application Examples
High-precision temperature control can be achieved in combination with the G3PA.
1. Control Using Current Input
3. Control Using Internal Adjuster
2. Control Using External Adjuster
Applications 1, 2, and 3 each use a different type of input method
and so it is necessary to change the settings of the input selection
slide switches. Be sure to change the slide switch settings in accor-
dance with the input method.
Note: 1.
For details of input selection slide switch settings, refer to
Setting the Input Method.
2.
The above examples are for when a G3PA-VD (except 60-A
models) is used at 200 VAC.
Cycle Control Unit
G32A-EA
5
Embedded System
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