Campbell Scientific A21REL Support and Manuals

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A21REL-12 Relay Driver - Page 1

INSTRUCTION MANUAL A21 REL-12 Relay Driver Revision: 12/91 Copyright (c) 1981-1991 Campbell Scientific, Inc.
A21REL-12 Relay Driver - Page 2

...repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products. will be returned without prior authorization. Affiliate companies handle repairs for special, indirect, incidental, or consequential damages. does not accept collect calls. Warranty and Assistance The A21 REL-12 RELAY DRIVER...under normal use and service for a particular ...date of the problem, an RMA number...
A21REL-12 Relay Driver - Page 3

A21 REL-12 RELAY DRIVER FUNCTION: Provide drive capability for four external relays controlled by a 12 V source on the relay coil. CONTACT RATING: DC - 1 Amp at 20 V...invert their normal states until CTRL goes to 0V at 120 V COIL CURRENT: 13 mA/relay CONNECTIONS: +12 V External 12 V source Ground Low side of external source REL COM Low side of device under control REL NC Normally closed...
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  • A21REL-12 Relay Driver
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