· RS485 / MODBUS (RTU) serial communication enabled
· 4 alarm relays – 2 x change over, 2 x normally open (NO)
· Compatible with AMT, PDT and AMT-Ex dewpoint transmitters
· Installed in the safe area unless housed in an Exd Enclosure
· Panel mounted single channel indicator
· Process Variable (PV) retransmission in 0-20 mA or 4-20 mA
New to Range, the DS1500 with RS485 and MODBUS (RTU) is a digital dewpoint hygrometer and fully compatible with the Alpha Moisture Systems’ AMT, PDT and AMT-Ex Dewpoint Transmitters for continuous trace moisture measurement in most gases and dry compressed air.
The DS1500 system is factory configured to user specification to read in either °C dewpoint, °F dewpoint, ppm(v), ppb(v), g/m³ or lbs/MMSCF. The measured value is displayed on a large six-digit red LED display.
DS1500 offers a selectable 0-20 mA or 4-20 mA isolated retransmission signal and four programmable alarm relays.
A digital communication channel is provided via a RS485 (MODBUS RTU Communication Protocol) serial connection for remote interrogation of measured values and status of alarms and instrument.
Instrument configuration is achieved from the front keypad, without any hardware change. The selection of input type and alarm modes and other special functions, are also accessed and defined from the front keypad.
| Power: | 100 to 240 Vac/dc +/-10 %, 50/60 Hz |
| Type: | Red 7-segment 6-digit primary display |
| Annunciators: | Alarms 1 to 4 status LEDS. |
Relay Output 1 and 2
| Contact Type: | Single pole, changeover (SPDT) |
| Rating: | 3 A resistive, 240 Vac, 50/60 Hz (3 A / 30 Vdc Res.) |
Relay Output 3 and 4
| Contact Type: | Single pole, changeover (SPST-NO:) |
| Rating: | 1.5 A resistive, 250 Vac, 50/60 Hz (3 A / 30 Vdc Res.) |
Relay Output 3 and 4
| Contact Type: | Single pole, changeover (SPST-NO:) |
| Rating: | 1.5 A resistive, 250 Vac, 50/60 Hz (3 A / 30 Vdc Res.) |
Linear (Re-Transmitted) Output
| Ranges Available: | 0-20mA or 4-20mA linear in units selected |
| Accuracy: | ±0.5% max of display value |
| Load Impedance: | 500Ω max |
| Protocol: | MODBUS (RTU) |
| Data Format: | Number of data bits: 8, without parity, and one stop bit. |
| Physical Layer: | RS485. |
| Maximum No. of addresses: | 247. |
| Baud Rate: | Selectable – 1200, 2400, 4800, *9600, 19200, 38400 or 57600 bps. *Factory Default |
| Approvals: | CE |
| EMC: | Certified to BS EN61326-1 |
| Safety: | Complies with BS EN 61010-1 |
| Instrument Front Panel Seal: | To IP54 |
Reference Conditions
| Supply Voltage: | 90 – 250V, 50/60Hz |
| Power Consumption: | AC=10VA/DC=4VA max |
Operating Conditions
| Temperature: | 5 °C to 50 °C |
| Relative Humidity: | 0-90% non-condensing |
| Cut-out Dimensions: | 45mm (1.772 inches) x 93mm (3.661 inches) |
| Warranty: | 12 months in case of defective parts or faulty workmanship |
Related Products
AMT Transmitter
- Ultra-high capacitance aluminium oxide sensor delivers unsurpassed sensitivity, speed of response, accuracy, repeatability, stability, and long service life
- Unique AutoCal span correction feature
- Various dewpoint ranges available from -110 °C to 20 °C
- Compact 2-Wire 4-20 mA Loop Powered Dewpoint Transmitter
AMT-Ex Transmitter
- Certified Intrinsically safe to IECEx, ATEX for use in hazardous areas and with potentially explosive atmospheres using specified Signal Isolator in the safe area
- Ultra-high capacitance aluminium oxide sensor delivers unsurpassed sensitivity, speed of response, accuracy, repeatability, stability, and long service life
- Unique AutoCal span correction feature
PDT Transmitter
- Long-lasting bulk Polymer sensing element offers excellent accuracy, stability and response speed
- Various dewpoint ranges available from -60 °C to 50 °C
- Compact 2 Wire 4-20 mA Loop Powered Dewpoint Transmitter
- Economical solution for higher ‘wetter’ dewpoints, e.g., monitoring refrigerant driers
Exd options
- GUBH Flameproof Enclosure (type “d”) Ex II 2 G D
- Designed for installation in Ex Hazardous areas Zone 1, 21, 2 and 22. Flameproof to ATEX and IECEx certification for use in potentially explosive atmospheres
- Offered with either DS4000 or DS1200 Indicators and AMT-Ex Intrinsically Safe Dewpoint Transmitter
