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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

Please retain for future use.

QR520 12/22

Controller wiring

• 

 

Terminal 1

 (high voltage): 

POWER

ALARM

REL 1

 to 

REL 5

 

(relays)

• 

 

Terminal 2

 (low voltage): 

COMM

 (RS-485), 

PROBE1

 and 

PROBE2

IN1

 and 

IN2

 (digital inputs), 

A01

 to 

A04

 (analog 

outputs) 

• Follow     lead markings to ensure output leads are wired 

to the correct position on the main board.

COMM

- B A +

IN1 IN2  A01 A02  A03 A04 

PROBE

- B A +

Terminal 1

 

Terminal 2

 

PROBE 1

- B A +

PROBE 2

- B A +

INP

- I +

A +

B

A +

B

Probe wiring

1. With controller disconnected from power run the probe cable 

through the correct conduit opening.

2. Connect probe leads to the terminal connector 

PROBE1

 or 

PROBE2

Follow     lead markings for correct wiring of output leads.

3. Carefully put the wired terminal connector into place on the board.

4. Position excess cable through cable gland before tightening the nut.

5. Remove the ground screw and hardware located below the probe

 

connector. Attach the ground lead ( 

g

 ).

Probe cabling color code

Marking Attached Cable

Patch Cable

Functionality

GREEN

BLACK

0 V

B

WHITE

WHITE

RS-485 D –

A

YELLOW

BLUE

RS-485 D+

+

BROWN

RED

5 V

g

GREEN-YELLOW

GREEN-YELLOW

PROTECTIVE GROUND

Terminal 1

Terminal 2

Supported probe series and configurations

HI10

X  X

Y

8

Z Z

pH & Temperature

XX 

06

PTFE

 junction

16

Ceramic

 junction

Y

Glass sensor

Titanium Matching Pin

pH range

Temperature range

1

Low 

temperature

0.00 to 12.00 pH

–5.0 to 80.0 °C 

(23.0 to 176.0 °F)

3

High 

temperature 

0.00 to 14.00 pH

0.0 to 100.0 °C 

(32.0 to 212.0 °F)

4

Fluoride 

resistant

0.00 to 10.00 pH

–5.0 to 60.0 °C  

(23.0 to 140.0 °F)

HI20

X X – Y

8

Z Z

ORP & Temperature

XX

04

PTFE

 junction

14

Ceramic

 junction

Y

Sensor type

mV range

Temperature range

1

Platinum

 

± 2000 mV

–5.0 to 100.0 °C 

(23.0 to 212.0 °F) 

2

Gold

HI7630

– Y

8

Z Z

EC & Temperature

Y

2

Two-electrode

 

cell conductivity,

SS AISI 316, 

cell constant 

k ≈ 0.1/cm

EC  0.000 µS/cm to 30.00 mS/cm

TDS  0.000 mg/L to 15.00 g/L (TDS factor 0.5)

RES  34 Ω•cm to 99.99 MΩ•cm

Temperature   0.0 to 50.0 °C (32.0 to 122.0 °F)

4

 

Four-ring

 

conductivity,

platinum on glass,

cell constant

k ≈ 1.0/cm

EC  0.0 µS/cm to 999.9 mS/cm

TDS   0.0 mg/L to 400.0 g/L (TDS factor 0.5)

RES  1.00 Ω•cm to 9.99 MΩ•cm

Seawater Salinity   400.0 %NaCl, 42 psu, 80 ppt

Temperature   0.0 to 100.0 °C (32.0 to 212.0 °F)

HI7640

1 8

Z Z

Galvanic DO & Temperature

Galvanic

 sensor

Concentration  0.00 to 50.00 mg/L (ppm) 

Saturation  0.0 to 500.0 %

Temperature  −5.0 to 50.0 °C (23.0 to 122.0 °F)

HI7640

5 8

Z Z

Optical DO & Temperature

Optical

 sensor

Concentration   0.00 to 50.00 mg/L (ppm) 

Saturation   0.0 to 500.0 %

Temperature  −5.0 to 50.0 °C (23.0 to 122.0 °F)

8

Smart probe

, with RS-485 connection

ZZ

00

 supplied with DIN connector (without cable)

05

10

15

25

50

 fixed cable length (in meters)

pH

ORP

EC

Galvanic DO

Optical DO

Probes are sold separately.

Scan the QR code to download 

the user manual:

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