WIRING INSTRUCTIONS
■
M4 Screw (power input, power unit)
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 power ter-
minals.
3) Installation & environment
MAINTENANCE
Model HDC4-x-R is available as spare part to replace the
AC power unit.
Power units’ standard life is expected for 10 years with
average ambient temperature 35°C (95°F) and 1.0A load.
Contact M-System for use in extremely different conditions.
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HOW TO REPLACE THE POWER UNIT
1) Prepare Power Unit (switching regulator) model HDC4-
x-R.
2) Turn off the power supply connected to the Power Unit.
3) Remove the wire binding and wiring connected to the ter-
minal 1 – 2 and 4 – 5.
4) Loosen and remove the mounting screws
A
(2 places).
5) Detach the Power Unit from the Rack.
6) Attach the new Power Unit to the Rack and tighten the
screws in reverse order as explained above. The tighten-
ing torque of the mounting screws
A
is 0.8 N·m.
A : Mounting screws
1 : 24V DC (+)
2 : 24V DC (–)
3 : FG
4 : AC power (V)
5 : AC power (U)
1 2 3 4 5
A
A
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.
17BXE-U1
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-2906-A Rev.2 P. 3 / 3
