Power Connections; Power Requirements - KEP MMI-200 Series Operating And Installation Instructions

2.2 Power Connections

Make sure that all local and national electrical standards are met when installing the
MMI. Contact your local authorities to determine which codes apply.

2.2.1 Power Requirements

Power
The MMI can be powered by AC or DC power, depending on
the part number ordered. The MMI-2xx specified DC voltage
range is +12 to 27 Volts DC. This insures compatibility with
most DC systems. The MMI-2xxA can be powered by 115
VAC only. The MMI-2xxB can be powered by 230 VAC only.
The power conditioning circuitry inside the unit is accomplished
by a switching power supply. Due to the nature of switching
power supplies, a wide range of over and under voltages may
be used without adversely affecting the unit.
Fusing
The MMI-2XX series is fused internally with a self resetting
Requirements
60V 400mA fuse. It is recommended that all input power lines
be protected from product failure by a fuse or breaker.
If the display does not come on within 2 seconds of power up,
remove power. An internal diode will prevent damage if the
polarity of the DC power is incorrect. Check wiring to insure
proper connections and try to power up again.
Caution Adequate strain relief must be provided for the power connec-
Strain Relief tor, to ensure that vibration or the disturbance of cables during
maintenance does not cause the connector to pullout. Reten-
tion of the power cables by a tye-wrap onto the trunking, or an
adhesive pad mounted tye-wrap point is normally suitable.
Caution
High Voltage voltages or AC power mains to the DC input will make the
Connecting high MMI unusable and may create an electrical shock hazard to
personnel. Such a failure or shock could result in serious
personal injury, loss of life and/or equipment damage.
DC voltage sources should provide proper isolation from main
AC power and similar hazards.
Caution
Emergency EMERGENCY STOP should be fitted in any system
Stop using the MMI to comply with ICS Safety Recommen-
A hard wired dations.
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