
Chapter 2. Installation
Alarm Relay Connection
This connection alerts the user when a selected alarm condition exists. The
After the appropriate connections have been made, tighten the screws using a flathead screwdriver before reinserting the terminal block into the rear panel of the ATLAS 550.
Table
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Pin | Name |
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1 | Normally Closed (NC) |
| Opens when a selected alarm condition |
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| is present. |
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2 | Normally Open (NO) |
| Closes when a selected alarm condition |
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| is present. |
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3 | Common (COM) |
| Common connection between external |
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| circuitry and NC or NO terminal. |
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4 | Chassis Ground (GND) |
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External Alarm Relay Monitor Connection
This connection alerts the user when a selected external alarm condition ex- ists. This connection could be used to monitor a UPS with dry contacts or an- other ATLAS 550. The
After the appropriate connections have been made, tighten the screws using a flathead screwdriver before reinserting the terminal block into the rear panel of the ATLAS 550.
ATLAS 550 User Manual |