W2RS1
P. 2 / 2
EM-5516
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on the side of the unit.
U(+)
V(–)
POWER
10
11
+
–
OUTPUT 1
7
8
+
–
3
6
OUTPUT 2
The section enclosed by broken line is only with 2nd output option.
1
2
A
B
B
RTD
4
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
10 – 11 with a multimeter.
3) Input: Check voltage across the terminal 1 – 2 with a
sensitive voltmeter.
(With 20°C or 68°F, approx. 110mV with Pt 100Ω, approx.
55mV with Pt 50Ω.)
If RTD wires are broken, the output goes over 100% (be
-
low 0% with downscale) due to burnout function. Check
leadwires in such a case.
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.
The output signal can be finely adjusted to match it to a re
-
ceiving instrument, or to compensate input wire resistance
when the unit is combined with a zenor barrier. Follow the
regular calibration procedure explained below:
■
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 procedure
1) – 3).
5) Go through the same procedure for the Output 2.
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.
EXTERNAL DIMENSIONS
unit: mm (inch)
4
8 7
10
21.5(.87)
88.5 (3.48)
84 (3.31)
10 (.39)
22 (.87)
59 (2.32)
DIN RAIL
35mm wide
[4 (.16)]
11–M3
SCREW
72 (2.83)
29.5 (1.16)
53 (2.09
)
2–4.2x5
(.17x.20)
MTG HOLE
6 (.24) deep
114 (4.49)
11
5
6
1
2
3
9
6 (.23)
•
When mounting, no extra space is needed between units.
4 (.1
6)
