B5MS
P. 2 / 2
EM-55 Rev.3
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on the front of the unit.
■
EXTERNAL DIMENSIONS unit: mm (inch)
■
CONNECTION DIAGRAM
7 8
5 6
3 4
1 2
94 (3.70)
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)
3 (.12)
*
8
7
+
–
mA
MONITOR
+
–
+
–
LOAD
6
5
OUTPUT
24VDC
4 – 20mADC
*
DC ammeter's internal resistance 10 ohms max.
4
3
2
+
–
3
2
1
POTENTIOMETER
max.
min.
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Input: Check voltage across the terminal 3(+) – 2(–) with
a voltmeter to show 0V at 0% potentiometer input and
the same voltage as that across 4(+) – 2(–) at 100% in-
put.
3) Output: Check that the load is within the permissible
limit including wiring resistance.
Supply Voltage (V) – 12 (V)
Load Resistance (Ω) = ––––––––––––––––––––––––
0.02 (A)
(including leadwire resistance)
4) When you check the output signal, connect an ammeter
of which the internal resistance is of 10Ω max. to the
monitor terminals.
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:
■
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.
M-SYSTEM WARRANTY
M-System warrants such new M-System product which it manufactures to be free from defects in materials and workmanship
during the 36-month period following the date that such product was originally purchased if such product has been used under
normal operating conditions and properly maintained, M-System’s sole liability, and purchaser’s exclusive remedies, under this
warranty are, at M-System’s option, the repair, replacement or refund of the purchase price of any M-System product which is
defective under the terms of this warranty. To submit a claim under this warranty, the purchaser must return, at its expense, the
defective M-System product to the below address together with a copy of its original sales invoice.
THIS IS THE ONLY WARRANTY APPLICABLE TO M-SYSTEM PRODUCT AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICU-
LAR PURPOSE. M-SYSTEM SHALL HAVE NO LIABILITY FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES
OF ANY KIND WHATSOEVER.
M-System Co., Ltd., 5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN, Phone: (06) 6659-8201, Fax: (06) 6659-
8510, E-mail: [email protected]
