-40-
No.PF
※※
-OMA1007
○Working Principle
The Air Management System (AMS) functions in three modes: Operation, Standby and Isolation.
When the measured flow rate is below a set flow value "1. Standby flow rate (Threshold)" for longer than a
set time "2. Standby ON delay" and "3. Standby input signal" is ON (24 VDC by digital input or logic high by
PLC or OPC UA), the AMS output pressure will be reduced from the operation pressure down to the user
specified "4. Standby pressure". AMS is the non relief construction hence air consumption is required to
drop pressure to the standby pressure.
While in standby mode, and if enabled "5. Auto isolation", after a set time "6. Isolation delay" the Residual
Pressure Relief Valve will close, and the downstream pressure will be exhausted.
While in Standby Mode or Isolation Mode, if the "3. Standby input signal" switches OFF (0 V and logic
Low), the AMS output pressure will increase back to the operation pressure. If the "3. Standby input signal"
is ON (24 VDC/High) again within the set time "7. Standby OFF delay" after returning to operation mode,
the AMS will immediately return to Standby Mode.
If at any point the "8. Isolation input signal" is OFF (0 V/Low), the AMS will be forced into isolation mode.
Hysteresis can also be set for the standby flow rate threshold with parameter "9. Standby flow rate
(Hysteresis)".
∗
: The above describes the be haviour for the normally closed (NC) type. For normally open (NO) type, the isolation input signal
"8. Isolation input signal" is inverted.
•AMS##A series can be set the time to reach operation pressure with the "10. Pressure ramp up duration".
•AMS##B series have a "11. Soft start function" when it back from isolation mode to operation mode.
The table below summarizes the AMS inputs and parameters.
Item
Name
Type
1
Standby flow rate (Threshold)
Configurable parameter.
2
Standby ON delay
Configurable parameter.
3
Standby input signal
Process Data or Digital Input.
4
Standby pressure
AMS##A: Configurable parameter.
AMS##B: Hand adjustable.
5
Auto isolation
Configurable parameter.
6
Isolation delay
Configurable parameter.
7
Standby OFF delay
Configurable parameter.
8
Isolation input signal
Process Data or Digital Input.
9
Standby flow rate (Hysteresis)
Configurable parameter.
10
Pressure ramp up duration
Configurable parameter.
11
Soft start function
Mechanical, configurable by an adjusting screw on the product.
