M2SBS
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on the side of the unit.
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
13 – 14 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
■
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 the input signals which should lead the
calculated result as 0%, and adjust output to 0%.
2) SPAN: [K
1
≥ 1] Apply the input signals which should
lead the calculated result as 100%, and adjust output to
100%.
[K
1
< 1] Apply the input signals which should lead the
calculated result as [100
×
K
1
]%, and adjust output to
[100
×
K
1
]%.
3) Check ZERO adjustment again.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
EQUATION
Output = K
1
×
Input 1 – K
2
×
Input 2
(K
1
×
Input 1 > K
2
×
Input 2)
K
1
: 0.40 to 2.00 specified when ordering
K
2
: 0.10 to 2.00 specified when ordering
Input 1, Input 2: 0 to 120%
Forcibly limited to 0% and 120% respectively when
the signal is out of range.
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
Warm up the unit for at least 10 minutes.
[K
1
≥ 1] Apply the input signals which should lead the cal-
culated result as 0%, 25%, 50%, 75% and 100%. Check that
the output signal for the respective input signal remains
within accuracy described in the data sheet.
[K
1
< 1] Apply the input signals which should lead the cal-
culated result as 0%, [25
×
K
1
]%, [50
×
K
1
]%, [75
×
K
1
]% and
[100
×
K
1
]%. Check that the output signal for the respective
input signal remains within accuracy described in the data
sheet.
When the output is out of tolerance, recalibrate the unit ac-
cording to the “ADJUSTMENT PROCEDURE” explained
earlier.
EXTERNAL DIMENSIONS
unit: mm (inch)
5
9
21.5 (.85)
70.5 (2.78)
84 (3.31)
10 (.39)
15 (.59)
6 (.23)
59 (2.32)
DIN RAIL
35mm wide
[4 (.16)]
8–M3
SCREW
72 (2.83)
23 (.91)
2–4.2x5
(.17x.20)
MTG HOLE
6 (.24) deep
114 (4.49)
• When mounting, no extra space is needed between units.
4
8
12
14 13
1
4 (.16)
1
4
+
–
INPUT 1
5
8
+
–
INPUT 2
+
–
OUTPUT
9
12
U(+)
V(–)
POWER
13
14
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SENTRONIC
AG
