Load Cell Indicator - Model IQ240

Model IQ240

is a programmable panel-mount precision digital indicator for load cell and strain gauge applications. The alphanumeric 6-digit high-bright LED display is quick and easy to set up with plain language helpful menu prompts.

With precision front end circuitry for high accuracy and stability, the ratiometric circuitry automatically compensates for temperature drift and excitation voltage variances due to cable loss.

The load cell excitation voltage is 5VDC for use with both 4-wire and 6-wire load cells, powering up to 6 x 350Ω load cells.

Advanced features include auto-zero tracking; user input linearisation; max/min recording; programmable front pushbuttons; 2 programmable digital inputs; security menu lockout; motion indication; advanced digital filtering; automatic offset calibration; plus many more to provide an all-in-one precision load cell indicator.

RS232 serial communications is supplied as standard with MODBUS™ RTU and MODBUS™ ASCII protocols. A simple ASCII-out protocol is also provided for serial printing and communicating to large displays.

Model IQ240 options include up to 4 relays, analogue retransmission, a second serial RS485 interface and real time clock.

High bright 6-digit 14-segment LED displays for easy setup and calibration
4 or 6 wire load cell / strain gauge input
Powers up to 6x350Ω load cells at +5VDC excitation voltage
High precision 24 bit ratiometric ADC front end circuitry
-199999 to +999999 display counts
Easy calibration using known weights
IP65, NEMA 4, UL Type 4, 48 x 96mm ABS/Polycarbonate enclosure
16 Bit Analog output (0/4-20mA or 0-10V)
RS232 communications (MODBUS™ RTU / ASCII and Infiniteq ASCII protocols)
RS485 communications (MODBUS™ RTU / ASCII and Infiniteq ASCII protocols)
2 Programmable digital inputs (pull up or pull down field jumper selectable)
3 Programmable front panel push buttons
Universal mains switch mode power supply (85-264VAC) standard with built in EMI and fuse protection
16 Point lineariser
Auto-zero tracking function
Automatic offset calibration
Tare function
Gross/Net function
Selectable and adjustable advanced digital filtering
Alarms, Motion indication and Net front panel status LED's
Max / Min recording
Security menu lockout
Built in menu help hints and prompts
Field upgradable firmware via the RS232 interface
1 year warranty

*General:*	Model IQ240
Display	6-digit, 13.8mm (0.543”) 14 segment high brightness red LED
Display range	-199999 to +999999
Decimal point	0 to 0.00000
Status LED's	6 LED's for SP1 to SP4, Net, Motion
Digital Inputs	2 Programmable digital inputs
	Built in hysteresis, filter and input over voltage protection
	Maximum input voltage <30VDC
	Input logic is field jumper selectable
	(Pull up, sinking inputs) - 10kΩ internal resistor to 5V
	(Pull down, sourcing inputs) - 10kΩ internal resistor to common
	Active/Non-Active input trigger: <1.9V
	Non-Active/Active input trigger: >2.3V
Keypad	4 keys total, 3 programmable keys
Memory storage	Non-volatile EEPROM, 100000 write cycles minimum
Warm up time	15 minutes
*Power Requirements:*
AC Supply	85-264VAC, 50/60Hz or 120-370VDC
	Isolation: 3000VAC/1min
Low DC Supply	10-30VDC input
	Reverse and over voltage protected
	Isolation: >1000V/1min
High DC Supply	25-70VDC input
	Reverse and over voltage protected
	Isolation: >1000V/1min
Power Consumption	<10W (Depending on options selected)
Fuse (built in)	2A Slow Blow (Wickmann_3721200000)
	RS components part number_226-6599
*Environmental:*
Operating temperature	-10°C to 50°C (14°F to 122°F)
Storage temperature	-40°C to 80°C (-40°F to 176°F)
Operating / storage humidity	<85% RH non-condensing
*Enclosure:*
Overall Dimensions	96 x 48 x 112mm (LxHxD) (3.78 x 1.89 x 4.41”)
	(Depth includes connectors)
Mounting	92 x 45mm (3.62 x 1.77”) cut-out
Enclosure material	Rear ABS, Front polycarbonate
Front facia rating	IP65, with o-ring supplied as standard
Wiring connections	Removable terminal blocks
*Input:*
ADC Resolution	22 bit Delta-sigma
Input range	-20mV to +35mV
Conversion rate	12 updates/second
Filter	Moving average digital filter with programmable input step detection
Increment size	1, 2, 5, 10, 20, 50, 100, 200
Input Impedance	>20 MΩ
CMRR	>-110dB
Linearity	<0.01% of full scale
Accuracy	0.05% of full scale
Calibration method	From the load cell calibration certificate or from using known weights
Load cell connection	4 or 6 wire connection + shield (sense included)
*Load Cell Excitation:*
Excitation Voltage	Fixed 5V DC (sense included)
Excitation current	Max. 125mA Up to 4 x 350Ω or 8 x 1000Ω load cells
Cable compensation	4 wire Kelvin force sense feedback
Cable compensation resistance	<= 10Ω
*Analogue Output:*	(Optional)
	Ranges (menu selectable)
	0-20mA
	4-20mA
	+/-10V
DAC Resolution	16 Bit
Update rate	12 updates/second
Current output compliance	500Ω maximum load (current is source, not sink)
Voltage output compliance	1kΩ minimum load
Current open loop detection	Display flashes “mA.Loop” error message
Linearity	<0.02% of full scale
Accuracy	0.05% of full scale
*Communications:*
Protocols	MODBUS RTU
	MODBUS ASCII
	ASCII In (Infiniteq Protocol)
	ASCII Out (Infiniteq Protocol)
RS232 (standard)	Baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
	Data bits: 7 or 8 bits
	Parity: Odd, Even or None
	Stop bits: 1 or 2 stop bits
	Non isolated
RS485 (optional)	Baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
	Data bits: 7 or 8 bits
	Parity: Odd, Even or None
	Stop bits: 1 or 2 stop bits
	Internal 120Ω field jumper selectable termination resistor
	Max 32 instruments per line
*Setpoint Relays:*	Optional, up to 4 can be fitted
*Electro-mechanical:*
Contact rating	2A@240VAC or 30VDC (resistive load)
Isolation to input circuitry	>1000Vrms for 1 minute
Type	FORM-C (change over contact, NO / NC)
Life expectancy	>100K cycles min. at full load rating. External RC snubber extends relay life for operation with inductive loads
*Solid-State (SSR):*
Contact rating	120mA@400VAC/DC
Isolation to input circuitry	>1000Vrms for 1 minute
Type	FORM-A (normally open)
*Real Time Clock:*	(Optional RTC)
Battery	CR2032
Accuracy	Better then 3 seconds per day (temperature dependent)

Order codes and options:

IQ240 for 85-264VAC auxiliary supply
-700   10-30VDC auxiliary supply
-701   25-70VDC auxiliary supply
-710   1 mechanical change-over Form C relay
-711   2 mechanical change-over Form C relays
-712   3 mechanical change-over Form C relays
-713   4 mechanical change-over Form C relays
-720   1 solid-state Form A relay
-721   2 solid-state Form A relays
-722   3 solid-state Form A relays
-723   4 solid-state Form A relays
-730   16 bit analogue output, 0/4-20mA, 0-10V
-731   16 bit isolated analogue output, 0/4-20mA, 0-10V

-740   Second communications RS485 interface
-750   Real time clock

-760   Engineering units legends
-761   Power connector protective cover
-762   115VAC inductive load suppressor
-763   230VAC inductive load suppressor
-764   2A slow-blow panel meter replacement fuse
-765   R-C snubber noise and arc suppressor
-766   Transparent protective front cover