Multiloop, multifunctional safety logic solver and alarm

June 28, 2024

SLA multiloop, multifunction safety logic solver and alarm is designed to meet IEC 61508:2010 standards, and it’s certified by exida for use in safety instrumented systems (SIS) for systematic integrity up to SIL 3 and for random integrity up to SIL 2.

SLA performs as a multiloop logic solver with built-in voting and enhanced math capability typically found in costly and complex safety PLCs. This lets SLA to handle simple alarming and more complex schemes that include 1oo2, 2oo3 or even 5oo8 voting architectures, enabling it to act on potentially hazardous process conditions; warn of unwanted process conditions; provide emergency shutdown; or provide on/off control in SISs and traditional alarm-trip applications.

Four-wire (line/mains powered) SLA accepts up to four discrete and six analog inputs from devices and sensors. HART data from connected field devices passes through SLA to its analog outputs, giving connected hosts and asset managers bidirectional communications for continuous monitoring and programming. Its four relay outputs and up to four discrete contact closure outputs can be driven by any of 16 internally configured alarms, where individual or multiple alarms can be assigned to each relay or discrete output, which can also be triggered by any input or internal diagnostic fault.

Three optional analog outputs allow transmission of any input or internally calculated equation or variable. SLA is easily programmable with any FDT-compliant host using SLA’s DTM with simple drop-down menus and checkboxes; no custom or licensed software is required. This ease-of-use functionality includes an equation editor that users can employ to create monitoring, alarming, and control schemes involving simple to complex equations using timers, running min/max functions, prebuilt analog and discrete logic functions and more.

SLA also features secure programming and communications with security jumpers that can be set to prevent unauthorized reprogramming, and ensure read-only communications through Ethernet and Modbus ports. It supports Modbus/TCP and Modbus RTU protocols, and has an embedded, read-only web server that allows all inputs, outputs, internal variables and various other parameters to be read with a simple web browser.  

Moore Industries International Inc.