Compact dual differential-pressure monitoring with live touchscreen readings, configurable alarms, alarm history, and Modbus communication for industrial integration.
±500 Pa Dual DPModbus TCP / RTUAlarm Relay + Buzzer
ASAS compact differential pressure monitoring device with touchscreen display.
Product overview
Built for pressure monitoring, alarming, and fast setup.
ASAS monitors two differential pressure sensors, displays Sensor-1, Sensor-2, and the calculated S1-S2 value in Pa, and gives operators direct access to datalog, settings, and device information from the home screen.
The controller combines a 2.8 inch resistive touchscreen, local buzzer, relay output, alarm history, IP configuration, and Modbus RTU serial configuration in one compact 114 x 84 x 37 mm package.
0
Differential pressure inputs
Dual sensor channels with ±500 Pa range per channel.
0
Key register values
Sensor 1, Sensor 2, and active alarm flag for supervisory systems.
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Alarm history entries
Recent alarm events with date and time for review and investigation.
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Modbus RTU
Serial Modbus RTU communication for external system integration.
Key features
Everything operators need on the panel.
Designed for straightforward commissioning, clear local operation, and reliable integration with site systems.
DP
Dual pressure monitoring
Live values for Sensor-1, Sensor-2, and S1-S2 differential pressure in Pa.
UI
Touchscreen control
2.8 inch TFT RGB 65K resistive touchscreen with clear menu navigation.
AL
Alarm relay and buzzer
Built-in alarm buzzer with NO/NC relay output rated 250VAC 1A.
M
Modbus integration
Modbus TCP and Modbus RTU communication for connected systems.
CFG
Configurable operation
Set sensor names, low and high limits, offsets, alarm delays, and sensor enable/disable state.
LOG
Alarm logging
Review alarm log records with sequence, date, time, sensor, state, and Pa value.
Technical snapshot
Compact hardware with practical connectivity.
ASAS is powered through USB-C or 5VDC input and provides Ethernet, Modbus RTU, pressure sensor input, and alarm relay connections in a compact enclosure.
ASAS technical specifications
Power
USB-C or 5VDC input
Display
2.8 inch TFT RGB 65K, 320 x 240, resistive touch
Sensors
Differential pressure sensors, ±500 Pa x 2
Alarm output
Buzzer and relay output, NO/NC, 250VAC 1A
Comms
Modbus TCP / Modbus RTU communication
Registers
HR1 DP Sensor 1 Value, HR2 DP Sensor 2 Value, HR3 active alarm flag
Configurable
Sensor name, low limit, high limit, offset, alarm delay, enable/disable
Alarm log
10 alarm history entries with date and time
Dimensions
114 x 84 x 37 mm (W x H x D)
On-device interface
Simple navigation from monitoring to setup.
Operators can move from the main page to datalog, settings, or info screens. Settings pages provide access to naming, high and low limits, offsets, bypass, alarm delay, clock, IP, and Modbus RTU configuration.
01
Monitor live values
View Sensor-1, Sensor-2, and S1-S2 in Pa from the home screen.
02
Review alarm logs
Check sequence, date, time, sensor, state, and alarm value.
03
Configure parameters
Edit sensor names, limits, offsets, bypass state, and alarm delay.
04
Set communications
Configure IP address and Modbus RTU values, then restart to apply changes.
Views and interface
Product views and touchscreen pages.
Click any image to enlarge.
Main touchscreen
Clear readings, quick navigation, and alarm visibility.
The main page shows the current time and date, live sensor values, calculated S1-S2 differential value, and quick access to Datalog, Settings, and Info.
Operation notes
Recommended operating practice.
Use ASAS together with site SOPs and commissioning records before changing settings.
•Record the original value before changing any alarm limit, offset, or communication setting.
•After configuration changes, verify live readings and alarm behavior from the main page.
•Keep bypass periods short, controlled, and documented from start to finish.
•Keep the controller clock accurate so alarm log timestamps remain useful.
•Restart the device after IP address or Modbus RTU communication changes.
Need ASAS for your monitoring application?
Talk to Anson Engineering about differential pressure monitoring, alarm integration, commissioning requirements, and site-specific configuration.
