Swann AMI Phosphate-II Operator's Manual page 77

AMI Phosphate-II
Program List and Explanations
5.3.2 and 5.3.3
5.3.2.1
5.3.2.20
5.3.2.300
5.3.2.400
5.3.2.50
5.3.2.1
5.3.2.22
A-96.250.641 / 290121
Relay 1 and 2: The contacts can be set as normally open or normal-
ly closed with a jumper. See
tion of relay contacts 1 or 2 are defined by the user.
Note: The navigation in the menu <Relay 1> and <Relay 2> is
equal. For reason of simplicity only the menu numbers of Relay 1
are used in the following.
1 First select the functions as:
- Limit upper /lower,
- Control upwards /downwards,
- Timer
- Fieldbus,
2 Then enter the necessary data depending on the selected func-
tion.
Function = Limit upper/lower:
When the relays are used as upper or lower limit switches, program
the following:
Parameter: select a process value (Phosphate 1)
Setpoint: If the measured value rises above respectively falls below
the set-point, the relay is activated.
Range: 0.00–10.00 ppm
Hysteresis: within the hysteresis range, the relay does not switch.
This prevents damage of relay contacts when the measured value
fluctuates around the alarm value.
Range: 0.00–10.00 ppm
Delay: Duration, the activation of the alarm relay is retarded after the
messuring value has risen above/fallen below the programmed
alarm.
Range. 0–600 sec
Function = Control upwards/downwards:
The relays may be used to drive control units such as solenoid
valves, membrane dosing pumps or motor valves. When driving a
motor valve both relays are needed, relay 1 to open and relay 2 to
close the valve.
Parameter: select a process value (Phosphate 1)
Choose the respective actuator:
 Time proportional
 Frequency
 Motor valve
Relay Contacts 1 and 2, p. 24. The func-
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