Strain Gauge Load Cell Digitiser Card | RS232 | RS485

At a Glance

Extremely Compact
RS232 & RS485 Output Versions
Available Protocols: ASCII, MantraBUS II, Modbus RTU, MantraCAN (J1939)
High Speed: 500 Readings/Second max
Available with In-Line Enclosure for Mounting on Load Cell Cable

Delivers a Digital Output for Easy PC or PLC Connection
Fast & Simple Fitting Thanks to its OEM PCB Format
Optimum Performance Guaranteed with its 1 Part in 200,000 (18bit) Resolution
Improved Transducer Results with Digital Linearisation and Temperature Compensation
Harsh Environment Option – Total Dust & Low Pressure Water Jet Protected Enclosure

Description

The DSC is a load cell digitiser that takes a strain gauge input and converts it to an RS232 or RS485 digital signal. The strain gauge converter is designed for use with a variety of transducers including load cells, pressure transducers, torque sensors and displacement transducers.

The DSC strain gauge load cell digitiser offers high accuracy, high-speed signal conversion with digital linearisation and temperature compensation to improve transducer far beyond its normal performance level. Available protocols are; ASCII, MODBUS and MantraCAN (J1939).

Designed to be mounted in-line with the transducer, the load cell converter is available pre-mounted in an IP65 enclosure. There are two enclosure options; the DSJ1 which holds a single load cell converter, and the DSJ4 which holds four load cell converters. The DSJ4 requires RS485 output versions of the load cell converter as this is the only type suitable for ‘daisy-chaining’ on a single bus.

The PC-based calibration of the strain gauge converter can be performed directly from the sensor output signal, or as an mV/V sensitivity entry for ultimate flexibility.

Other strain gauge converter features include very high resolution of up to 1:200,000, high speed output at up to 500 updates/second and programmable dynamic filtering.

Technical Specifications

DSCH High Stability

Parameter	Min	Typical	Max	Units
Bridge Excitation	4.5	5	5.25	VDC
Sensor Impedance up to 18v Supply	320	350	5,000	Ohms**
Sensor Impedance up to 12v Supply	120	350	5,000	Ohms**
Bridge Sensitivity	-3		+3	mV/V
Offset Temperature Stability		1	4	ppm/C
Gain Temperature Stability		3	5	ppm/C
Offset Stability with Time		0.002	0.008	%FR
Gain Stability with Time			30	ppm of FR/1st Year
Non Linearity		0.0005	0.0025	%FR
Resolution @ 1Hz (Noise Stable) *		200,000		Counts/Divisions
Resolution @ 10Hz (Noise Stable) *		120,000		Counts/Divisions
Resolution @ 100Hz (Noise Stable) *		50,000		Counts/Divisions
Resolution @ 500Hz (Noise Stable) *		18,000		Counts/Divisions
Optional Temperature Measurement Resolution		0.1		ºC
Optional Temperature Measurement Accuracy		1		ºC
Notes: From original offset at any time. Stability over 100 second period. *Subject to supply voltage. See Electrical Specification
Electrical
Power Supply Voltage	5.6	12	18	V dc
Power Supply Noise/Ripple			100	mV ac pk-pk
Power Supply Current (350R Bridge)		45	60	mA
Power @ 10V Supply (350R Bridge)		350		mW
Sensor Impedance up to 18v Supply	320	350	5,000	ohms
Sensor Impedance up to 12v Supply	120	350	5,000	ohms
Excitation System 4 wire		4 wire
Environmental
Operating Temperature Range	-40		85	°C
Operating Temperature Range for OIML 6000d	-10		55	°C
Storage Temperature	-40		85	°C
Humidity	0		95	%RH on Condensing
Communications
RS485 Data Rate	2,400		230k	Baud
CAN Bit Rate	10k		1M	Bits/Sec
Note: Update speeds are selectable to 1, 2, 5, 10, 20, 50, 60, 100, 200, 300, 500 Samples/Sec
Protocols
Please Note: MantraCAN products will only work with Microsoft operating systems up to and including Windows 10.

DSCS Industrial Stability

Parameter	Min	Typical	Max	Units
Bridge Excitation	4.5	5	5.25	VDC
Bridge Impedance	320	350	5,000	Ohms
Sensor Impedance up to 18v Supply	320	350	5,000	Ohms**
Sensor Impedance up to 12v Supply	120	350	5,000	Ohms**
Bridge Sensitivity	-3		+3	mV/V
Offset Temperature Stability		5	10	ppm/C
Gain Temperature Stability		30	50	ppm/C
Offset Stability with Time		0.0035	0.016	%FR „]
Gain Stability with Time			300	ppm of FR /1st Year
Non Linearity		0.0005	0.0025	% FR
Internal Resolution		16 Million		Counts/Divisions
Resolution @ 1Hz (Noise Stable) *		66,000		Counts/Divisions
Resolution @ 10Hz (Noise Stable) *		40,000		Counts/Divisions
Resolution @ 100Hz (Noise Stable) *		10,000		Counts/Divisions
Resolution @ 500Hz (Noise Stable) *		5,000		Counts/Divisions
Optional Temperature Measurement Resolution		0.1		°C
Optional Temperature Measurement Accuracy		1		°C
Notes: From original offset at any time. Stability over 100 second period. *Subject to supply voltage. See Electrical Specification
Electrical
Power Supply Voltage	5.6	12	18	V dc
Power Supply Noise/Ripple			100	mV ac pk-pk
Power Supply Current (350R Bridge)		45	60	mA
Power @ 10V Supply (350R Bridge)		350		mW
Sensor Impedance up to 18v Supply	320	350	5,000	ohms
Sensor Impedance up to 12v Supply	120	350	5,000	ohms
Excitation System	4 wire
Environmental
Operating temperature range	-40		85	°C
Storage temperature	-40		85	°C
Humidity	0		95	%RH Non Condensing
Communications
RS485 Data Rate	2,400		230k	Baud
CAN Bit Rate	10k		1M	Bits/Sec
Note: Update speeds are selectable to 1, 2, 5, 10, 20, 50, 60, 100, 200, 300, 500 Samples/Sec
Protocols
ASCII, MANTRABUS II, Modbus RTU or MantraCAN (J1939).
Please Note: MantraCAN products will only work with Microsoft operating systems up to and including Windows 10.
Support Modules	Instrument Explorer Software free PC software, RS232 - RS485 Convertor, DCell Evaluation Kits
CE Environmental Approvals	European EMC Directive 2004/108/EC, Low Voltage Directive 2006/95/EC