Adapts M‑2001 Series Digital Tapchanger Control to Replace Pennsylvania

Transformer and McGraw‑Edison 110. 220. 220A, 550 and 550B

Type LTC Transformer Controls Produced Before 1963

• Connects easily to the M‑2001 Series Digital Tapchanger Control using

mounting screws and 24‑pin connector

• Provides direct mechanical replacement of the existing LTC transformer

control using the same two knurled knobs from the existing control

• Provides built‑in CT shorting protection when the M‑2001 Series Digital

Tapchanger Control is removed.

The M‑2379 is an adapter panel which, when combined with the M‑2001

Series Digital Tapchanger Control, provides convenient direct replacement

for the following Pennsylvania Transformer and McGraw‑Edison LTC

transformer controls manufactured before 1963: 110. 220. 220A, 550 and

550B.

Interface

External connections are made at two terminal blocks located on the rear

panel of the M‑2379B and two terminal blocks located on the printed circuit

board. These terminal blocks provide access to auxiliary functions, including

self-test alarm, user-programmable alarm, auto disable and manual raise/

lower. A fifth terminal block provides for the addition of the M‑0329B LTC

Backup Control. The two knurled knobs must be saved from the existing

control cabinet.