JMA stager controller functions:
◆ Password setting
◆ Calendar
◆ Regeneration stage and regeneration time indication
◆ JMA can be initiated manually or through remote control. Timer initiation and interval initiation are also
available.
◆ Manual step by step initiation (only for system commissioning)
◆ Reset function
◆ Stages (1-8) and stage duration (5-9999 Sec) settings
◆ System working stage indication (Service or regeneration stage indication)
◆ Data protection after power cut: settings and data can be stored for 3 years.
◆ Waterproof and rotproof enclosure
Stager working principle:
The stager may be manually operated or driven by an electric motor that operated through an adjustable timer or flowmeter program. The stager functions by opening and closing its ports, singly or in combination, in a sequence that fit the need of the system. The “positions” in the sequence correspond to the number of “stager” in the process (See chart 1). The port that are opened allow the pressurized fluid to flow to and operate some diaphragm valves, while venting other valves—allowing them to return to their normal positions.
The stagers can use either hydraulic or pneumatic control fluid. Continuous electrical power is not required to maintain the positions of the valves such as in a solenoid operated system. Greatly avoid the system breakdown because of power failure.
All types of complex application can be controlled by stager controller system through correct design and combination of the stagers.
Next is Typical Circuit Application for JMA 502

STAGER POSITION	SOFTENER FUNCTION	VALVES OPEN
4	SERVICE	1, 2
1	BACKWASH	3, 4 (2A)
2	BRINE	5, 2  (2A)
3	FAST RINSE	6, 1  (2A)

JMA stager controller specifications:
◆ Automatic restoration function
◆ Waterproof enclosure (waterproof and shockproof)
◆ Power supply: 220VAC/50HZ
◆ Timer initiation setting: any time of the day 7 days one week
◆ 8 stages available with duration from 5 to 9999 seconds for each stage
◆ Manually initiation
◆ Service/regeneration Light indication
◆ Auxiliary signal output
Technical figures:
Electrical supply: 220VAC/50HZ, 10W
Remote control signal: At least 2 seconds/dry contactor
Pressure port size: 1/8”G thread
Control fluid: hydraulic or pneumatic (100μfilter is recommended for the system)
Control fluid pressure: 0.2~0.8MPa
Temperature: 4~60℃
Enclosure size: 270 mm X 170 mm X 105 mm
Applications: