Power Connections - KEP MMI-7 Series Installation Instruction

2.2 Making a NEMA-4 Mounting
The unit can be mounted into panels with a depth of 4"(105mm). It is recommended that
Panel
the unit be mounted on the front panel of a steel enclosure, through an appropriate
Details
opening*. Allow a clearance of 1"(25mm) around the sides of the unit for mounting
hardware. Allow clearance for cable connections to the back of the unit. Unit depth may
vary according to cable type used. Typically, plan a depth to accommodate at least
3"(105mm) behind the panel.
Note: Deburr and clean cutout before beginning installation.
*Cutout dimensions:
NEMA-4 Put the unit through the panel cut out. Slide the clamps into the 4 or 6 holes provided
around the case. Tighten the clamping screws in an even pattern until the unit is secured in
Mounting
the panel.
Do not over tighten mounting clamps!
Caution!
To seal to NEMA-4 specifications, all supplied mounting clamps must be used and
Note:
panel must not flex more than 0.010".
Specifications

3.0 Power Connections

Make sure that all local and national electrical standards are met when the installing the unit. Contact your
local authorities to determine which codes apply.
3.1 POWER REQUIREMENTS
Power
Fusing
Requirements
MMI-720 / MMI-750 / MMI-750T / MMI-750T-HB
5.43
7.56"(192mm) W x 5.43"(138mm) H
[138]
Panel Mounting
clamp, 4or 6 places
Panel
The MMI can be powered by DC power only. The specified voltage range is
+22 to 25 Volts DC. This insures compatibility with most controller DC
systems.
The power conditioning circuitry inside the unit is accomplished by a
switching power supply. The peak starting current can be as high as 700mA.
It is recommended that all input power lines be protected from incorrect
wiring or product failure by a 2 Amp fuse or a breaker.
Note: If the display does not come on within 2 seconds of power up, remove
power. An internal fuse prevents damage if the polarity of the DC power is
incorrect. Check wiring to insure proper connections and try to power up
again.
7.56 [192]
2