M-system MDR-8 User manual

MDR-8
P. 1 / 2EM-8131 Rev.6
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
BEFORE USE ....
Thank you for choosing M-System. Before use,check the package
you received as below.
If you have any problems or questions on the product, please
contact M-System's Sales Office or representatives.
n PACKAGE INCLUDES:
Lightning surge protector................................................. (1)
n MODEL NO.
Check that model No. described on specification label is exactly
what you ordered.
n INSTALLATION / INSTRUCTION MANUAL
This manual describes necessary points of caution when you
use this product, installation, and basic maintenance procedure.
LIMITATION APPLICABLE TO M-RESTER
The M-Rester will protect electronics equipment from damage
caused by lightning by absorbing most of the surge voltages.
However, M-Rester may not be effective against certain
extremely high voltages caused by a direct or almost direct
hit by lightning.
M-Rester must be installed according to this installation /
instruction manual.
GENERAL
n FUNCTION & FEATURES
• Designed specifically for ON-OFF signals, protecting semicon-
ductor switches used for ON-OFF outputs from the computer
or PLC from lightning surge damage that enters on the wiring
between these instruments • 8 channels • Most convenient as
junction board • Minimum mounting space
n SPECIFICATIONS
BTWN LINES LINE TO COM LINE/COMTO G
Discharge voltage ±30V min. 30V min. ±60V min.
Max. surge voltage* ±40V max. 40V max. ±650V max.
Leakage current ≤5µA
@±30V DC
≤5µA
@30V DC
≤5µA
@±60V DC
Response time ≤0.1 µsec.
Discharge current 1000A (8 / 20 µsec.)
Max. load current 100mA
Int.series resistance approx. 100Ω
*The maximum voltage that could pass through M-RESTER. Pro-
tected equipment must be able to withstand this voltage for a very
short time period.
POINTS OF CAUTION
nENVIRONMENT
• Indoor Use
• When heavy dust or metal particles are present in the at-
mosphere, install M-RESTER inside proper housing and
ventilate it.
• Do not install the M-RESTER where it is subjected to
continuous vibration. Do not apply physical impact to the
M-RESTER.
• Environmental temperature must be within -5 to +55°C
(23 to 131°F) and relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
nDIELECTRIC STRENGTH TEST
• DO NOT perform dielectric strength tests with wires con-
nectedtotheunit.Otherwisetheelementwillstartdischarg-
ing at discharge voltage,which can cause insulation failure.
Be sure to return the wires after the test.
nAND ....
• We recommend that you keep spare M-RESTERs so that
you can replace them when necessary.
• Lightning surge can enter not only through signal lines
but also through power supply lines. We recommend that
you also use the Lightning Arrester for Power Lines for
sufficient protection.
COMPONENT IDENTIFICATION
n REAR VIEW
SURGE
SIDE
S1
S2
S3
S4
S5
S6
S7
S8
COM
GND
PROTECT
SIDE
P1
P2
P3
P4
P5
P6
P7
P8
COM
GND
Body
Specification Label
INSTRUCTION MANUAL
MULTI M-RESTER MODEL MDR-8

MDR-8
P. 2 / 2EM-8131 Rev.6
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
INSTALLATION
Refer to the figure below.
nEXTERNAL DIMENSIONS mm (inch)
P1
PROTECT
SIDE
SURGE
SIDE
S1
P2S2
P3S3
P4S4
P5S5
P6S6
P7S7
P8S8
COMCOM
GNDGND
130 (5.12) 145 (5.71) 160 (6.30)
70 (2.76)
95 (3.74)
25 (.98)
40 (1.57)
4–4.5 (.18) dia.
MTG HOLE
20–M3 SCREW
•When mounting, no extra space is needed between units.
TERMINAL CONNECTIONS
Connect the unit as in the diagram below.
Be sure to cross-wire between the ground terminal (G) and
that
of the protected equipment.
TELEMETER
PLC
XMTR
M-RESTER
PROTECTED
EQUIPMENTM-RESTER
P1
P2
P8
G
COM
RELAY
METAL
HOUSING
FIELD
S1
S2
S8
COM
S1
S2
S8
G G
COM
P1
P2
P8
COM
All negative lines are connected to COM.
M-RESTER PROTECTED
EQUIPMENT
G
G
CROSSOVER WIRE
GROUNDING
(100 ohms or less)
A crossover wire between M-RESTER ground and the ground or
metallic housing of the equipment is required for protection.
If the protected equipment has no ground terminal, ground the
M-RESTER only.
MAINTENANCE
Check M-RESTER periodically. Many cases of lightning are
ignored, and even lightning at a far distance often causes
inductive surges. We recommend that you check your M-
RESTER about twice a year, before and after the rainy sea-
son. Check whenever you experience a strong lightning oc-
currence. Checking procedure is explained in the following:
nCHECKING
WIRING
• Make sure that wiring is done as instructed in the con-
nection diagram.
• Make sure that the ground terminal (G) is connected to
the metallic housing of protected equipment.
• Make sure that the ground terminal (G) is grounded to
earth.
DISCHARGE ELEMENTS
Remove all wiring connected to M-RESTER when you test
the discharge elements.
• Check resistance across the following terminals on the
high resistance range of multimeter and confirm no con-
duction. (The meter will show 10MΩ or greater.) Termi-
nals (P1) or (P2) or (P3) or (P4) or (P5) or (P6) or (P7) or
(P8) – (COM), (COM) – (G) When measuring across the
Px – COM, apply the positive voltage to the Px terminal.
• Check that discharging occurs across the same terminals
with a 500V DC/1000MΩ megger. (The megger will show
20MΩ or less.)
• If any of the above tests shows negative, replace the M-
RESTER