HC320

Controller HC320 Technical Information * HC320 is a versatile controller with 2 independent limits * Analogue input: 0(4)-20mA * Zoomfunction: 100% at 10-20mA * 2 relay outputs * Optional max. or min. limits * Start timer and reaction timers * Hysteresis function on both limits * Digital input: Optional active high or low * Alarm blocking using digital input Version 1.0 Features Application HC320 is generally used for the supervision of mA signals. The signal may be delivered by a standard sensor with 4-20 mA output or from one of our HCxxx transmitters. The HCxxx familiy consists of transmitters for pH, O2, conductivity and temperature etc. Power consumption may be supervised using the HC320 with one of our APM modules. Analogue input The analogue input is a current input, and may be set up to either 020mA or 4-20mA. Futhermore, the input may be scaled to display 100% down to 10mA. Digital input The HC320 may be configured to both positive and negative logic on the digital inputs. Using parameter no. 10 the input may be set to either active high og active low. With positiv logic the accepted input voltage range is 5-30Vdc. Negative logic is achieved by connecting the input to Gnd - i.e. by using a swicth. Relay output The unit contains two relays - one for each limit. The relays are both connection relays, but the polarity may independently be inverted using parameters no. 7 and no. 8. Alarms are reset by either pressing the ‘Mode’ key or by activating the external reset ...