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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