M5MS
EM-2465 Rev.6 P. 2 / 2
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on the front of the unit.
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EXTERNAL DIMENSIONS unit: mm (inch)
94 (3.70)
3 (.12)
25 (.98)
41 (1.61)
[3.3 (.13)]
• When mounting, no extra space is needed between units.
DIN RAIL
35mm wide
8–M3.5 SCREW
7.3 (.29)
1 2
3 4
5 6
7 8
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CONNECTION DIAGRAM
3
2
1
max.
min.
+
−
POTENTIOMETER
+
–
OUTPUT
5
6
4
3
2
8
7
U(+)
V(–)
POWER
WIRING INSTRUCTIONS
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SCREW TERMINAL
Torque: 0.8 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Input: Check voltage across the terminal 3(+) – 2(–) with
a voltmeter to show 0 V at 0% potentiometer input and
the same voltage as that across 4(+) – 2(–) at 100% input.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory with the total resist-
ance input, therefore you do not need any calibration if you
use the potentiometer’s total resistance.
When you do not use the total resistance or in case of regu-
lar calibration, adjust the output as explained in the fol-
lowing.
■
HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
MAINTENANCE
Regular calibration procedure is explained below:
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CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
056 222 38 18
www.sentronic.com
SENTRONIC
AG
