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) Alarm operations: Check the alarm operations referring
to the figure below.
5) Output load: Check that the output load is 380 V AC/120
VA or 125 V DC/30 W at the maximum. For maximum
relay life with inductive load, external protection is rec-
ommended.
ALARM RELAY OPERATIONS
–50
0
+50
▲
Deviation
(%)
Output 2
Setpoint
▲
Output 1
Setpoint
Output 1
(9–10)ON
Output 2
(1–2)ON
(1–3)ON
(9–11)ON
Trip Operation in Power Failure
•
Output 1
: (9 – 10) turn ON with code 1
(9 – 11) turn ON with code 2
•
Output 2
: (1 – 2) turn ON with code 1
(1 – 3) turn ON with code 2
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
Warm up the unit for at least 10 minutes.
•
Hi Setpoint
Increase the input signal from a value lower than the set-
point and check that the trip point remains within the
accuracy described in the data sheet.
•
Lo Setpoint
Decrease the input signal from a value higher than the
setpoint and check that the trip point remains within the
accuracy described in the data sheet.
When the trip points are out of tolerance, contact M-Sys-
tem’s Sales Office or local representatives.
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.
AYDV
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-1615 Rev.7 P. 3 / 3
