Beckwith Electric M-2901 Surface Mounting Kit

Provides Surface Mounting of the M‑2270 Adapter Panel

• Connects easily to the M-2270 Adapter Panel using a slide-on mounting

bracket that has a 27-position terminal block, and includes four hex

female stand-offs, four screws and appropriate wiring

• Provides mounting onto any flat surface at least 11-1/2" wide and 8" high

The M-2901 is an adapter kit which permits surface mounting of the

M-2270 Adapter Panel which is used with the M-2001 Digital Tapchanger

Control. The M-2901 consists of a mounting bracket with a 27-position

terminal block that slides on to the bottom of the M-2270. The kit includes

four 3/8" hex female stand-offs, four l/4"-20 x 1/2" screws, and twenty-seven

wires-fifteen of which have lug nuts at one end. External connections are

made to terminal block TB3 on the adapter kit bracket.

INSTALLATION

Refer to the INSTALLATION chapter of the M-2270 Adapter Panel Application

Guide for the M-2270's outline and hole drill dimensions. Slide the M-2901

Surface Mounting Kit's mounting bracket onto the bottom of the M-2270 so

that the terminal block is facing outward. Using the wires provided on TB3.

make the wiring connections to TBl and TB2 of the M-2270. as shown in the

figure TB3 Connections for the M-2901 Surface Mounting Kit.

Mount the M-2001 Tapchanger Control to the back of the M-2270 Adapter

Panel and secure with the four screws provided. The four screws are shipped

in a drawstring bag which is attached to the adapter panel.

Insert the plug from the adapter panel into the connector at the base of the

M-2001.

Then install the M-2270 Adapter Panel (with the M-2001 Tapchanger Control

and M-2901 Surface Mounting Kit) onto the flat surface, securing with the four

hex female stand-offs and screws provided with the kit.

INTERFACE

External connections are made to the 27-pin terminal block TB3 on the

M-2901's mounting bracket, and provides standard functions, such as motor

power input, voltage input, voltage reduction and tapchanger raise and lower,

along with auxiliary functions, such as self-test alarm, user-programmable

alarm and operations counter. TB3 has matching connections with the M-2270

Adapter Panel's TBl and TB2 pin numbers.

TESTING SPECIFICATIONS

• High Voltage: All input and output terminals will withstand 1500 Vac rms to 

chassis or instrument ground for one minute with a leakage current not to

exceed 25 m.A, for all terminals to ground. Input and output circuits are

electrically isolated from each other, from other circuits and from ground.

• Surge Withstand Capability: All input and output circuits are protected against

system transients. Units pass all requirements of ANSI/IEEE C.37.90.1-1989

defining surge withstand capability.

• Radiated Electromagnetic Withstand Capability: All units are protected against

electromagnetic radiated interference from portable communications transceivers

as outlined in ANSI/IEEE C37.90.2-1987 defining radiated electromagnetic

withstand capability.

• Control Accuracy Specification: All units comply with ANSI/IEEE C57.15-1986

defining control accuracy of operation.

ENVIRONMENTAL

Temperature Range: Stated accuracies are maintained from -40° to +80° C.

Humidity: Stated accuracies are maintained under 95% relative humidity (non-

condensing). Fungus Resistance: A conformal printed circuit board coating inhibits

fungus growth.

PHYSICAL

Size with M-2270 Adapter Panel:

Overall dimensions are 13-3/4" high x 5-13/16" wide x 3-9/16" deep (34.9 cm x

14.8 cm x 9.1 cm).

Approximate Weight: 1 lb. (0.45 kg).

Approximate Shipping Weight: 2 lbs. (0.91 kg).

Approximate Weight with M-2270 Adapter Panel: 8 lbs. (3.63 kg).

WARRANTY

The M-2901 Surface Mounting Kit is covered by a five year warranty from date

of shipment.