Rice Lake IQ Plus 520 Scale Indicators

IQ Plus 520 Scale Indicators are a compact and economical solution for process control and batching functions. They are the only programmable scale indicators with a counting scale function. Their compact panel mount enclosure conserves space in control panels and other custom system designs, allowing convenient rear access for connections and maintaining a NEMA 4X/IP67 seal to protect electronics.

Download the 520 IQ Plus Brochure.

IQ Plus 520 Scale Indicators

Notable Features

  • 0.75" (19 mm), seven-digit Vacuum Fluorescent Display (VFD)
  • 16-character 0.25" (6.3 mm) VFD prompting display
  • Eight configurable operator prompts
  • Three digital inputs and four digital outputs
  • Selectable A/D measurement rates up to 120/second
  • Two communication ports: EDP port-full duplex, RS-232 and RS-485; Printer port-full duplex, RS-232 or 20 mA current loop
  • Five programmable ticket formats for Gross, Net, Setpoints, Count, and EDP format
  • 8 setpoint kinds
  • Programmable stream print format
  • Time and date
  • Pushbutton or scrolled tare entry Over/accept/under checkweigh mode
  • Front panel or serial confi guration/calibration
  • 5-point linearization calibration
  • Millivolt calibration
  • Gravitational compensation calibration
  • Power for eight 350 ohm load cells or sixteen 700 ohm load cells
  • Expansion port for option card
  • Key functions: zero, gross-net, tare, units, print
  • Desktop model with panel mount kit can be mounted in existing UMC2000 cutouts

520 Scale Indicators


Specifications Description
Power Line voltages:115 or 230 VAC
Power consumption: 200 mA @ 115 VAC
160 mA @ 230 V AC
Frequency: 50 or 60 Hz
Excitation Voltage 10 VDC, 8 x 350 Ω or 16 x 700 Ω load cells
Analog Signal Input Range 0.3 mV/V – 4 mV/V
Analog Signal Sensitivity 0.3 μV/graduation @ 7.5 Hz,
1.5 μV/graduation @ 120 Hz
A/D Sample Rate 7.5 – 120 Hz, software selectable
Resolution Internal resolution: Approximately 8 million counts
Display resolution:100,000 dd
System Linearity 0.01% of full scale
Circuit Protection RFI, EMI, ESD protection
Update Rate 60 times/seconds
Serial Ouput EDP port: Full duplex RS-232 or RS-485
Printer port: Full duplex RS-232 or active 20mA
current loop output, 2 wire
Both ports: 300 to 19,200 bps; 7 or 8 data bits;
even, odd or no parity
Display Vacuum Fluorescent Display (VFD), 7-digit,
14-segment primary weight display. 2 character
unit descriptions
16-character dot matrix display for additional
symbols, user prompts
Keyboard 5-key membrane panel, tactile feel
Digital I/O Digital inputs: 3 inputs, TTL or switch closure, active-low
Digital outputs: 4 outputs, current limited with TTL pull-up
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 lb (2.7 kg)
Approvals NTEP - certified at 10,000 Divisions, Class III/IIIL,
CC# 01-087
Measurement Canada approved, AM-5425;
Class III/III HD at 10,000 divisions
OIML at 10,000 divisions (GB-1160)
Desktop CUL listed
Panel mount RU recognized
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