Wireless Input And Pulse Counter - A Cost-effective And Compact Solution For System Integrators
- Published: Thursday, 07 June 2018 18:42
Carlo Gavazzi’s has launched the SHJWIN, a new wireless digital input module that can also be used to count pulses from energy meters (gas/water/electric) and other sources.
The module has 4 x inputs that can be configured individually either as digital contact inputs or pulse count inputs, from class B SO outputs usually found on energy meters.
Fast and easy to install; its compact design makes it ideal for installation in a junction or wall box, or anywhere where space is restricted. The module boasts a wireless range to 700m in free air. Each module can also function as a repeater, extending the maximum free air range up to 2.1km.
All count values are stored locally in a non-volatile memory within the module itself, pulses can still be recorded even if the wireless path is interrupted. The count values are transferred to the main controller when wireless coverage is restored.
The internal count buffer can store values up to 99999999 and is fully scaleable, and has an automatic roll-over function when the maximum count value is reached.
The SHJWIN is used as part of a Dupline® system. Dupline® bus wiring topology is completely free which means the installation can be carried out using the lowest cost route rather than just multi dropping from sensor to sensor. Either way this solution is easier and cheaper than traditional parallel wiring, which also reduces the number of DDC’s and sub-panels required and provides higher flexibility for last minute changes and enhancements. A simple unscreened 2 core bus cable is all that is required to make the Dupline® connection, a 4 core cable can be used to transmit the power around with the Dupline® bus for when you need to power the environmental sensors. CO2 + Temperature + Humidity information is converted from 0/4-20mA to Dupline® locally before being transmitted back over the Dupline® network to the controller.
The SHJWIN is suited to applications such as de-central counting of pulses from energy, water and gas meters and general purpose input.