Driver Installation

AC Input Type Installation
Drivers are designed to dissipate heat through natural convection. Install the driver vertically as shown. When installing the separate bracket model driver vertically in the device, use bracket A; when installing the driver parallel to the bottom use bracket B.

Models with Built-In Brackets RK Series UI2120G

Separate Bracket Models AlphaStep AS Series UMK Series

Using Multiple Axes
When using multiple stepping motor axes, driver temperature rises will cause ambient temperature to rise. At least 0.79 inch (20 mm) must be allowed between driver units and at least 0.98 (25 mm) between drivers and other equipment or structures. Install forced-air cooling fan if ambient temperatures exceed 122°F (50°C) [104°F (40°C) for some products].

Installation Conditions
Install the driver in a location that meets the following conditions. Using the product under conditions other than this could cause it to be damaged.

• Indoors (This product is designed and manufactured to be installed within another device)
• Ambient temperature
  32°F to 122°F (0°C to +50°C) (nonfreezing)
  32°F to 104°F (0°C to +40°C) [for UMK Series driver and UI2120G]
• Ambient humidity: 85% maximum (noncondensing)
• Not exposed to explosive, flammable, or corrosive gas
• Not exposed to direct sunlight
• Not exposed to dust
• Not exposed to water or oil
• A place where heat can escape easily
• Not exposed to continuous vibration or excessive impact

Notes:
When installing the driver in an enclosed space such as a control box, or somewhere close to a heat-radiating object, vent holes should be used to prevent the driver from overheating.
Do not install the driver in a location where a source of vibration will cause the driver to vibrate.
In situations where drivers are located close to a large noise source such as high-frequency welding machines or large electromagnetic switches, take steps to prevent noise interference, either by inserting noise filters or connecting the driver to a separate circuit.
Take care that pieces of conductive material (filings, pins, pieces of wire, etc.) do not enter the drivers.

DC Input Type Installation
Considering heat radiation, install the driver vertically or board side down. Install the driver in a way that the power element side faces up and the aluminum electrolytic capacitor side faces down.

Horizontal Installation

Vertical Installation

Installation Conditions
Install the driver in a location that meets the following conditions. Using the product under conditions other than this could cause it to be damaged.

• Indoors (This product is designed and manufactured to be installed within another device)
• Ambient temperature
  32°F to 122°F (0°C to +50°C) (nonfreezing)
  32°F to 104°F (0°C to +40°C) [for UMK Series driver and UI2120G]
• Ambient humidity: 85% maximum (noncondensing)
• Not exposed to explosive, flammable, or corrosive gas
• Not exposed to direct sunlight
• Not exposed to dust
• Not exposed to water or oil
• A place where heat can escape easily
• Not exposed to continuous vibration or excessive impact

Notes:
When installing the driver in an enclosed space such as a control box, or somewhere close to a heat-radiating object, vent holes should be used to prevent the driver from overheating.
Do not install the driver in a location where a source of vibration will cause the driver to vibrate.
In situations where drivers are located close to a large noise source such as high-frequency welding machines or large electromagnetic switches, take steps to prevent noise interference, either by inserting noise filters or connecting the driver to a separate circuit.