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Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895  USA 

www.hannainst.com

HI520 Dual-Channel Universal Process Controller

Quick Reference Guide

HI510-02 wall mount

HI510-01 panel mount

Hanna is committed to developing and deploying digital solutions 
with a positive impact on the environment and climate.

Scan the QR code or follow the link to download the user 
manual. 

https://manuals.hannainst.com/HI520

HI520-0320

3

 relays & 

2

 analog outputs

HI520-0540

5

 relays & 

4

 analog outputs

Package contents

• 

HI520

 

controller

• Cable gland seals (1 set)

• Power cable, 3 m (9.84’) long

• Instrument quality certificate and quick reference guide

Note:

 Save all packing material. Any damaged or defective item must 

be returned in its original packing material with the supplied accessories.

Controller models

Dear Customer, 

thank you for choosing Hanna Instruments.

HI520

 is a universal process controller intended for applications where 

simultaneous measurement and control of process variables is needed. 

Main features

• Hanna Smart digital probes
• RS-485 / Modbus serial communication protocol
• Independent / sequential channel control
• Flexible function assignment for control, cleaning, Hold relays
• IP65 / NEMA 4X protection
• Wall, pipe, panel mounting kit (sold separately)

Safety precautions

• Electrical connection must be carried out by specialized personnel 

only. Read safety manual instructions before connecting to power.

• Do not make electrical connections with device connected to power.
• Do not run other cables through the designated power cable gland.
• Have a disconnect switch installed in the vicinity of the instrument 

to ensure electrical circuit is de-energized for installation.

Opening the enclosure

• Loosen the four screws, enough for the springs to push them out.
• Grasp the front bezel and swing open to access the 

two-

terminal 

power supply board.

Connecting to power 

• Remove the blank plug and thread the cable through the power 

cable gland.

• Remove the safety cover to access high voltage Terminal 1.
• Connect the probe leads to the terminal connector 

POWER

Follow     lead markings for correct wiring on the supply 
board. Each leads location is marked.

• Ensure the power connector is seated correctly in the power socket. 
• Replace safety cover over Terminal 1.

Power cable

SIGNAL

PATH

POWER

PATH

Blank plug

Probe accessories (sold separately)

Saddle

BL120-5

XX

Flow cell

BL120-4

XX

Immersion electrode holders

HI60501 HI60503

HI510-03 pipe mount

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