RCA15 Rack Mounted Intelligent Strain Gauge Amplifier

Selectable Strain Gauge sensitivity from 0.5 to 200mV/V
Simple one pass auto calibration
Auto Tare
Isolated analogue outputs 4-20mA and 0-10V outputs
10V @ 1.4A excitation for each rack
High accuracy/low drift
3U 19" rack frame
10 year data retention
Digital programming, calibration & display
Optional Communications for each channel include RS485, RS232
Optional 2 setpoints/relays for each channel

The intelligent Strain Gauge amplifier offers both 4 to 20mA and 0 to 10 volt analogue outputs, from any standard Strain Gauge input. Ease of calibration and setting of the analogue output range, make the modules extremely user friendly; being set up by a simple hand held plug in programmer or a built in programmer/display.
Auto Tare and Peak Hold (if set) on the analogue output are operated via volt free contact closures.

Output options include:-

Relay Set Points (Programmed in engineering units; with In Flight compensation and Hysteresis settings available for control or alarm purposes)

Communications:-

To read any value, change set points or any other parameter via:
RS232/RS485 (RC3) - Formats MANTRABUS, ASCII, MODBUS RTU
Printer Activated by a contact closure, displays the current live value, with header message, engineering units, auto incrementing batch number and a real time if required.

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Input Details
The input is suitable for any full wheatstone bridge sensor and transducer excitation voltage 9.6 volts 1.0A (common to all channels).
Compensation	by ± sense wires for cable connection, voltage drops and any variation in the excitation supply.
Load cell sensitivity	is preset via DIL switches to 0.5, 0.8, 1.0 1.25, 1.5, 2.0, 2.5, 3.5, 5,10, 20, 50, 100 or 200mV/V.
Initial offset	≤±0.15mV (15µV/V) which is cancelled during auto calibration.
Speed	10 readings per second with a digital filter to reduce speed.
Accuracy	is 90 days ±0.08% of reading, ±0.05% FSD (typically)
Drift	is ±0.002% per degree C @ 2.5mV/V (typically)
Resolution	15 bit (4.5 digits)
Contact inputs	Available for auto tare, print and peak hold reset and are volt free
Rack Mounted Load Cell Amplifiers
Two versions are available to mount in the standard 19” rack
Version 1 (RL1)	comprises an amplifier which is programmed via a hand held, plug in programmer. This version allows for the fitting of the 12 amplifiers.
Version 2 (RL2)	comprises an amplifier which has a front panel mounted LCD display; program buttons are accessed through 2.2mm apertures in the panel. This version allows for the fitting of 8 amplifiers.

Analogue Outputs
Drive	4-20mA up to 1Kohm and 0-10 volts up to 2mA.
Accuracy	4-20mA ±0.15% of range (typically) 0-10V ±2% before calibration
Resolution	13 bit (Settling time 0.25 secs to 1% of step change)
Isolation	±130V RMS or DC max to analogue input or any other port.
Data Retention/Protection
Retention	10 years for set up values, minimum of 100,000 write cycle
	Protection of data and function(s) Watchdog timer giving repeat auto resets.
	Impending power detection and hold off.
	Keypad security and time out.

Options Available
2 set points	Output through 5A, 230V ac SPCO relays (volt free contacts with latching and inversion options
Communications Port	20mA loop - enabling up to 254 to be multi dropped to 1 x RS232 via IF25 interface
	RS485 - enabling up to 32 units to be multi dropped (isolated)
	RS232 - for 1 to 1 connection and standard printer drive (isolated)
	Baud Rates - 300, 600, 1200, 2400, 4800, 9600 (19200 MANTRABUS only)
CE & Environmental
Storage temperature	-20 to +70ºC
Operating temperature	-10 to 50°C
Relative humidity	95% maximum non condensing
Safety/Low Voltage Directive	2006/95/EC
EMC Directive	2004/108/EC