Digital Inputs • Two digital inputs for remotely triggering, cleaning and hold functions Analog Outputs • Up to 4 analog outputs and 5 relays used for control and for sending a signal to data loggers, PLC, SCADA and other remote monitoring systems • 0-20 mA or 4-20 mA • Scalable in selecting values for the range • Can be used for control of pumps and valves • On alarm state can output a 22 mA signal to the monitoring system Digital Communication • The Modbus-compliant unit can be integrated within a Modbus-based network and connected to other industrial electronic devices. The following tasks may be accomplished remotely: · Monitoring, using the virtual LCD (limited to a single remote control in the entire network) · Setup · Loading the Setup configuration file to a controller • RS485 Digital output for PC and other device connectivity Relays • Up to 5 control and 1 alarm electromechanical relays • Replaceable 5A fuses to protect all relays • Extractable terminal blocks for easy wiring • Relay options include single pole double throw (SPDT) and single pole single throw (SPST) • Control relays can be programmed for On/Off, Proportional, or PID control as well as Cleaning and Hold functions • Configurable alarm relay • Relays terminal blocks and their wires paths are separated from the low voltage section for additional safety Inputs and Outputs HI520 shown 15 Process Instrumentation 15.52 | www.hannainst.com controllers
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