!
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The!four!digital!inputs!o perate!from!ei ther!a!DC!voltage! signal!or!switc h!cl osure!(“volt!free”!contacts)!
Open!contacts!(>500 0!ohm) !or!2!to !24VDC!signal! =!Logic!High!
Closed!contacts!(<50!ohm)!or!‐0.6!to!+ 0.8VDC!sig nal!=!Logic !Low.!
Five!rear!terminals!are!used.!25 !to!28!are!C1!to!C4!+v e!in put,!with!33!a!shared!common!–ve!
They!are!“ Edg e!Sensitive ”!requiring !a!h igh! to!low!or!Low!to!High!logic!state!transi tion!to!change!the!functi on!status.!Current!
state!is!remembered!at!power!down.!
!
!
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The!four!digital!(or!logic)!inputs!are!se tup!in!a!sub‐menu!of!Input!Configuration!called!“Digin!Function!Select”.!They!are!
numbered!C1!to!C4.!
!
Each!o f!these!can!be!set!per form!a! single!f unc tion!from!this!list:!
• !IP1!Peak!Reset! ! ! Resets!stored!peak!value!to!match!the!current!input! 1!value .!
• IP2!Peak!Reset! ! ! Resets!stored!peak!v alue!to!ma tch! the!current!input! 2!value .!
• IP1/2!Peak!Reset! ! Resets!stored!peaks!to!match!the!current!input!1!&!2! values.!
• Ala rm!Reset! ! ! Resets!any!lat ched!al arm!ou tput!relays !(if!alarm!not!active).!
• IP1!Peak!&!Alarm!Reset! ! Resets!latched!alarm s!and!input!1!stored!peak!value!
• IP2!Peak!&!Alarm!Reset! ! Resets!latched!alarm s!and!input!2!stored!peak!value!
• IP1/2!Peak!&!Alar m!Reset! Resets!latched!alarm s!and!input!1!stored!peak!value!
• IP1!Zero!Calib ration! ! Per forms!a!zero!calib ration!on!input!1!
• IP1!Zero!Calib ration! ! Per forms!a!zero!calib ration!on!input!1!
• IP2!Zero!Calib ration! ! Per forms!a!zero!calib ration!on!input!2!
• IP1/2!Zero!Calibratio n! ! Per forms!a!zero!calib ration!on!input!1! and!2!
• IP1!Zero!Cal,!Alrm,!Pk!Reset! Per forms!IP1!zero!cal ,!plus!resets!peak!&!latch ed!outputs!
• IP2!Zero!Cal,!Alrm,!Pk!Reset! Per forms!IP2!zero!cal ,!plus!resets!peak!&!latch ed!outputs!
• IP1/2!Zero!Cal,!Alrm,!Pk!R! Per forms!IP1&2!zero! cal,!plus!re sets!peak!&!latched!outputs!
• Data!R ecorder! ! ! Sta rts/ pauses!the!recording!of!data!(if!recorder!fitted)!
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As!UPR900!except,!these !additional!Digital!Input!functio ns:!
• Set point!S election! ! Selects!betwe en!the!local!and!alter nate!se tpoints!
• Auto/Manual!Ctrl!Select !! Switch es!the!control!bet ween!a utomatic!and!manual!modes!
• PID!Co ntrol!Outputs! ! Enables!or!Disables!the!PID!controller! outputs!
• Run!Pre!Tune! ! ! Engages!the!controllers!automatic!Pre‐Tune!function!
• Run!Self!Tune! ! ! Engages!the!controllers!automatic!Self‐Tu ne!function!
• Increment !Control!Output! Increases!the! con trol!output!value!(0‐100%!in !20s)!
• Decremen t!Control!Output! Reduces!the!cont rol!output!value!(100 ‐0% !in!20s)!
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