M5DYH2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-2457 P. 2 / 2
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the
connection diagram on the front of the unit.
■
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
■
CONNECTION DIAGRAM
■
When used as DC Supply
■
When used as Isolator
1
6
5
8
7
+
2
+
–
*
1
HHC
*
1
HHC
INPUT
–
4
3
+
–
2-WIRE
XMTR
-
+
V
MONITOR
-
+
2-WIRE
XMTR
250Ω
250Ω
1
2
3
4
+
–
3
1
4
2
+
–
+
–
+
–
-
+
–
+
*
1. Hand-held communicator
OUTPUT
*
1
HHC
LOAD
POWER
WIRING INSTRUCTIONS
■
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 that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
For HART communication, the resistance must be 250 Ω
±10%.
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 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.
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.
