Water Analytics AquaMetrix AM-2250 Installation And Operation Manual
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372250-series Operating Manual rev 2.06 OutputThe AM-2250TX transmitter has one 4-20mA output with optional PID.The AM-2250 and AM-2251 has two output modes:1. Three dry contact relays2. Two isolated 4-20 mA current outputs (Channel 1 with optional PID)When the 2250 is used for process control then one to three of the relays are configured. When the 2250is used in conjunction with PLC’s or SCADA systems then the 4-20 mA outputs are configured. PID controlis used for fine control of a process using the 4-20 mA output on the main board.6.1 Relays (AM-2250 and AM-2251)The AM-2250 and AM-2251 is equipped with three relays. Three relays give users the capability ofcontrolling a falling process, rising process and a physical alarm.Note: All instructions assume a relay is wired as normally open (NO). If a relay is wired normally closed(NC) then activate or open should be reversed, i.e. deactivate or close.Relay 1 Relay 2 Relay 3Relay 3 has additional option that allows activate relay based on temperature value. Other selections areidentical for all three relays.6.1.1 Relay modeThere are three relay mode available: rising, falling and range alarm:1. A rising process is one that triggers a relay when the process value rises above the set-point.2. A falling process triggers a relay when the process value drops below the set-point.3. A range alarm is triggered when the process value is (a) either above the high set-point or belowthe low set-point or (b) inside the two set-points. In most applications it is an out-of-range alarm. |
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