Temperature, Humidity, CO2 Transmitter w/Two Relay and RS485 Outputs
A temperature transmitter is designed for two-state control of e.g. heating, ventilation, humidifier, dehumidifier, etc.
The transmitter is equipped with two relay outputs for alarm indication or control of external devices. For each relay setting of delay, hysteresis, an audible alarm is enabled.
Measured values are converted to galvanically isolated RS485 serial output. The transmitter contains a built-in temperature sensor. Degrees Celsius and Fahrenheit are user selectable. Parameters are easily adjustable from the regulator keyboard or from the computer. A large dual-line LCD display is an advantage. The transmitter is also equipped with three binary inputs for detection of two-state events - e.g. water, smoke, glass break detection, door contact.
Serial output RS485 is galvanically isolated from other circuitry to prevent collisions on the RS485 bus. The transmitter works with ModBus RTU communication protocol or with Advantech ADAM compatible protocol. The protocol is user selectable in special configuration mode by means of the PC. The serial link enables to read actual readings and modify transmitter configuration. The instrument works always in slave mode, i.e. responds only to master device queries. Transmitters have the address space available from 0 to 255. Communication speed is 110 to 115200Bd.
Applications
- Temperature control
- Monitoring of temperature and three binary signals at:
- Building management and automation
- Server rooms
- Telecommunication devices
- Warehouses, glasshouses
- Manufacturers
- Museums, archives, galleries
- Air-conditioned rooms, HVAC