Rice Lake 420 Plus Weighing Scale Indicators

420 Plus Weighing Scale Indicators are the perfect choice when it comes to tare entry, counting and setpoint outputs. They provide the bonus advantage of two internal setpoints and a full front keypad for simple calibration and configuration. Like other programmable weight indicators, the 420 Plus offers analog output and will also power as many as eight 350 ohm load cells or sixteen 700 ohm load cells.

Download the Indictator 420 Plus Brochure.

420 Plus Weighing Scale Indicators

Notable Features

  • Large .8 (20.3 mm) Light Emitting Diode (LED) Display
  • Full numeric keypad
  • NEMA 4X/IP66 stainless steel washdown enclosure
  • Power for eight 350 ohm load cells or sixteen 700 ohm load cells
  • Configurable analog to digital measurement rate
  • Primary/secondary units configuration: lb, kg, ounces, short tons, metric tons, grams, or none
  • Two independent communication ports: (2) full duplex, (1) unidirectional active 20 mA current loop
  • Standardized EDP command sets
  • Programmable ticket formats up to three 300-character printouts
  • Full front-panel digital calibration and configuration
  • Universal mounting stand
  • Three-stage digital filtering
  • Consecutive transaction numbering
  • Two digital inputs, two digital outputs
  • Time and date (volatile)
  • Count mode

420 Plus Weighing Scale Indicators


Specifications Description
Power AC Line voltages: 115/230 VAC
Frequency: 50 or 60 Hz
Power consumption: 1.5 A @ 115 VAC (8 W)
0.75 A @ 230 VAC (8 W)
Power DC Line voltages: 9-36 VDC DC input
Power consumption: 1.5 A Max
Excitation Voltage +5 VDC 8 x 350 Ω or 16 x 700 Ω load cells
Analog Signal Input Range -0.5 mV/V - 4.5 mV/V
Analog Signal Sensitivity 0.3 μV/graduation minimum,
1.5 μV/grad recommended
Resolution Internal resolution: 8 million internal graduations
Display resolution: 100,000 displayed graduations
Measurement Rate 60, 30, 15, 7 1/2, per second
System Linearity Within 0.01% of full scale
Digital I/O 2 inputs with 8 functions
2 outputs, 250 mA max sink
Circuit Protection RFI, EMI, ESD protection
Serial Ouput EDP port: Full duplex RS-232
Printer port: Full duplex RS-232 or simplex active 20 mA current loop
Both ports: 38400, 19200, 9600, 4800, 2400,
1200, 600, 300 bps; 7 or 8 data bits; even, odd, or no parity
Display 0.8 in (20 mm), 6-digit Super Red Light Emitting
Diode (LED) display, 7-segment, digits
Status Annunciators Designators for: center of zero, stand still, gross,
net, lb, kg, count, tare
Keyboard 21-key flat membrane panel
Operating Temperature Legal: 14°F to 104°F (-10°C to +40° C)
Industrial: 14°F to 122°F (-10°C to +50° C)
Weight 6.1 lb (2.8 kg)
Rating/Material Enclosure: NEMA 4X/IP66, heavy gauge
stainless steel
Approvals NTEP Certified per H-44 at 10,000 Divisions,
Class III/IIIL, CC# 04-076A5
Measurement Canada, AM-5554, Class III/IIIHD at 10,000 Divisions
OIML approval at 10,000 divisions, TC7004
UL & CUL listed
CE marked
Warranty Two year limited warranty


Contact us today: Toll Free: 1.800.268.3269 or by Email:

The Ownership and Management - Interweigh Systems Inc. 51 Bentley Street, Markham, Ontario, Canada, L3R 3L1
Phone: (416) 491-7001 ~ Toll Free: (800) 268-3269 ~ Fax: (905) 940-1711

Or contact us at one of our five locations: Markham, Mississauga, Woodstock, Montreal and Calgary