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4800 Controller Fixed Monitoring Systems
Versatile controller capable of monitoring as many as 48 analog inputs and 72 digital Modbus inputs. With on-board relays, unit can control alarms, fans, horns or other control devices. when alarm conditions are met. With simple user interface, relays can be programmed to activate from multiple channels, or multiple relays can be programmed to single channel. Each relay can also accommodate time delays which allows relays to activate after alarm conditions are met for specific periods, or deactivate after specific length of time prior to alarm. Unit can be set up either as Modbus RTU master unit to monitor digital input signals, or as Modbus RTU slave device. As Modbus RTU slave device, unit communicates to SCADA, HMI and PLC controlled systems. With telephone line interface, unit has remote call-out capabilities. This allows controller to phone, fax or page alarm notifications to users, and also allows unit to be remotely programmed via telephone. Phone lists are user programmable and can be entered in priority. Built-in event log keeps track of events, such as calibration records, peak readings and alarms. Log stores 1000 events and can be viewed via local printer or PC. Controller is designed to complement existing plant-wide systems or provide stand-alone control for fixed gas detection transmitters.