Square D Digest 179

Timers

SE Relays 820 Modular Timers

Refer to Catalog 8501CT1104

www.se.com/us

Wiring Diagram

Input Voltage

Input Voltage

U n

U n

External Control Switch (Dry Switch Only)

+

+

15 — Common 16 —Normally Closed 18 —Normally Open 26 —Normally Closed 28 —Normally Open 25 —Common

A1 S A2

A1 S A2

R

28 25 26

R

R

15 16 18

15 16 18

821TD10H-UNI

822TD10H-UNI

20 RELAYS AND TIMERS

20-49

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