Electro-Sensors SA420 Quick Start Manual Download Page 3

Wiring Connections:

Sensor Wire connections:

Terminal

Model

906/

Old 907

All other

ESI

Sensors

Mag

Pickup

Logic

Level

ESI

Prox/

New 907

5 Supply

Red

Red

N/C

N/C

Brown

6 Signal

Black

Clear

+

Signal

Black

7 Ground

Clr/Shd

Blk/Shd

-

Common

Blue

11 Signal B

Green

Green

N/C

N/C

White

Power Connections:

Terminal

115 VAC

Standard

230 VAC

Optional

12 VDC

Optional

24 VDC

Optional

2

Hot

L1 Hot

(+)Positive

(+)Positive

10

Neutral

L2 Hot

(-)Negative (-)Negative

Analog Output Connections:

Terminal

4-20 mA

Terminal

0-10 VDC

3

(+) High

9

(+) Positive

4

(-) Low

8

(-) Negative

Terminal

Connection

8

7

6

5

4

9

11

10

1

2

3

1

No Connect

2

Hot +

3

4-20mA +

4

4-20mA -

5

Sensor Supply

6

Sensor Signal A

7

Sensor Ground

8

0-10 VDC -

9

0-10 VDC +

10

Neutral -

11

Sensor Signal B

Figure 5: Terminal Block wiring

     

Frequency Calculations

Pertinent formula

: Frequency (Hz) = (RPM * PPR)/60

Example: A customer has a motor rotating at 1200 RPM and wants the 

SA420 to output 20mA at 1250 RPM using a Hall Effect sensor and an 

ESI 255 disc.

Since the Hall Effect sensors turns on with a south field and off with a 

north field, the 255 disc’s 16 alternating magnets (8 north and 8 south 

fields) will produce 8 PPR (Pulses Per Revolution). Insert 8 into the 

equation for PPR.

F = (1250 * 8)/ 60

F = 166.7 Hz [Value used in PR (01)]

Programming:

There are four buttons on the front panel used for calibration:

▲ Up Arrow Button is used to change the value of the position in focus 

(flashing), while in the calibration mode. While in standard mode, this 

button will toggle the display between frequency input (hertz) and output 

percentage. 

◄ Left arrow button is used to move the focus to the next position when 

in the calibration mode of 4-20 mA or 0-10 VDC.  

 Decimal Point Button is used to change the position of the decimal 

point while in the calibration mode. 

ENT

 Enter Button is used to enter or exit the calibration mode.

Programming The Unit:

Standard menu:

  To enter the calibration mode, push the 

ENT

 button 

once. PR0 will be displayed. Press the ▲ (up) button to increment to 

the desired variable. Press the 

ENT

 button at which time the value 

of variable is displayed. The right most digit of the variable will be 

flashing, which indicates that this digit has the focus and can be changed. 

Pressing the ▲ (up) button will increment the flashing digit. The ◄ 

button will advance the focus to the next digit to be changed. The • 

(DP) button will scroll the decimal point across the display from right 

to left if that variable has the decimal point enabled. When the correct 

value is programmed into the variable, press the 

ENT

 button to store the 

variables value in memory. The display will show PRxx (the variable 

you just updated). You can now ▲ (up) button to the next variable you 

wish to change or continue until you’ve  reached the end of variables and 

exit to user mode.

Basic menu:

  To enter the calibration mode, push the 

ENT

 button once. 

PR1 will be displayed for one second, and then the value of variable 

1 is displayed. This is the Max frequency value. the right most digit 

of variable 1 will be flashing, which indicates that this digit has the 

focus and can be changed. Pressing the ▲ button will increment the 

flashing digit. The ◄ button will advance the focus to the next digit to 

be changed. The • (DP) button will scroll the decimal point across the 

display from right to left. When the correct value is programmed into 

the variable, press the 

ENT

 button to store the variable into memory and 

access variable Pr02. Pr02 is the sensor type. You can now change Pr02 

to match the sensor output type if necessary or press the 

ENT

 button and 

advance to Pr03. Pr03 contains the input pulse buffer. When the value 

is correct press the 

ENT

 button to save value and to return to the user 

mode. 

ENT

SA420

OUT%

VAR                  RATE

Free Catalog and Application Assistance

1.800.328.6170

Website: www.electro-sensors.com

990-001700 Revision I

3-8

Summary of Contents for SA420

Page 1: ...o achieve the proper gap distance adjust the jam nuts holding the standard sensor in the mounting bracket or adjust the position of the explosion proof sensor using the slots on its mounting bracket P...

Page 2: ...wing units PR 04 Hz default Percent of maximum output User defined units Programmable minimum frequency cutoff PR 05 This allows you to decide where the unit zeroes out for faster zeroing More modes o...

Page 3: ...the calibration mode Programming The Unit Standard menu To enter the calibration mode push the ENT button once PR0 will be displayed Press the up button to increment to the desired variable Press the...

Page 4: ...o slew from 10 90 analog output PR 07 Signal Type Programming of PR 07 determines the way the signals are handled There are multiple choices for both single and quadrature operation 1X uses the rising...

Page 5: ...is approximately 366nA 0 000366uA of deviation up or down per single count of change Example of changing this from 1000 to 980 results in the analog decreasing It will decrease 20 0 000366uA or 0 007...

Page 6: ...0 0 5 VDC 1 0 10 VDC 2 5 VDC 3 10 VDC No 09 MENU_OPTION_VAR 1 0 1 0 Basic menu 1 Advanced menu Standard No 10 DISPLAY_OPTION_VAR 0 0 2 0 Hz 1 Percent output 2 User units No 11 reserved for future use...

Page 7: ...Disc 2 00 2 51 2 00 2 00 1 25 1 00 1 00 1 120 Figure 9 Standard Sensor 2 38 5 53 1 16 3 38 1 00 1 NPT 1 63 3 75 1 88 Nut Lockwasher 0 56 1 25 4 63 Figure 10 Explosionproof Sensor 1 00 43 0 13 2 75 1...

Page 8: ...hysical Envlronment Parameters Mounting DIN rail mount or Stand alone Operating temperature 0 C to 60 Cz Storage temperature 65 C to 125 C Electrical Connections 11 Position DIN rail terminal block DI...

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