Temperature and Humidity Controller for Greenhouse – DTH-966-A
DTH-966-A On-Off Controller or High/Low Alarms for Temperature & %Rh. Two input and Four Relay Outputs / 4 SSR Outputs / Dual 4-20mA Retransmission output and RS-485 MODBUS interface.
Size (H x W x D):96 x 96 x 120 mm
Technical Specifications :
| Parameters | Description |
|---|---|
| No. of Inputs | 2 (one each for Temperature and Relative Humidity). |
| Input | From Standard T + RH sensor / transmitter |
| Range | -40.0 to 60.0°C / 0.0 to 60.0°C / 0.0 to 80.0°C / 0.0 to 150.0°C and 0.0 to 100.0 %RH. (Subject to type of Sensor used) |
| Resolution | 0.1°C / 0.1% Rh. |
| Indicating Accuracy | Better than ± 0.1°C for temperature and ± 0.1% for RH. (Actual accuracy will depend on specified accuracy of selected Sensor / Transmitter). |
| Display | 4 digit 0.5” Red 7-segment display for temperature |
| 4 digit 0.5” Green 7-segment display for %RH (model dependent) | |
| Control Action | ON-OFF with programmable Hysteresis values. |
| Control Outputs | 4 x DC pulse (0-10VDC) to operate external Solid State Relays (SSR) |
| Alarm Outputs | High / Low alarm each for temperature and RH (total 4 outputs). |
| Retransmission Output | 4-20mA proportional to the specified temperature range |
| 4-20mA proportional to 0 to 100% Rh. (Optional feature) | |
| Open Sensor Indication | Display shows Open and control outputs will be turned OFF. |
| Settings | Using front panel membrane keyboard to set the various values. |
| Memory Backup | Retention of Set values in the non-volatile memory in the event of power failure. |
| Serial Interface | Two wire RS485 over Modbus RTU Protocol for PC interface. (Optional feature) |
| Supply | (90-250)VAC, 50/60Hz. |
| Size | 96 x 96 x 120 mm |
| Panel cut out | 92 x 92 +/-0.5 mm |
| Enclosure | ABS plastic with polycarbonate front. |