The STB NIB 1010 Basic NIM Module
Selecting a Source Power Supply for the Island’s Logic Power Bus
Logic Power |
| An external 24 VDC power supply is needed as the source for logic power to the |
Requirements |
| island bus. The external power supply connects to the island’s NIM. This external |
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| supply provides the 24 V input to the |
Characteristics |
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| The external power supply needs to deliver 24 VDC source power to the island. The | |
of the External |
| supply that you select can have a low range limit of 19.2 VDC and a high range limit |
Power Supply |
| of 30 VDC. The external supply must be rated safety extra low voltage |
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| The |
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| inputs and outputs, the power bus, and the devices connected to the island bus. |
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| Under normal or |
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| parts, or between an accessible part and the protective earth (PE) terminal for Class |
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| 1 equipment, will not exceed a safe value (60 VDC max.). |
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| CAUTION | |
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| IMPROPER GALVANIC ISOLATION | |
| The power components are not galvanically isolated. They are intended for use only | |
| in systems designed to provide SELV isolation between the supply inputs or outputs | |
| and the load devices or system power bus. You must use | |
| provide 24 VDC source power to the island. | |
| Failure to follow this precaution can result in injury or equipment damage. | |
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Calculating the |
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Wattage |
| The external supply needs to provide 13 W of power to the NIM. |
Requirement |
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Suggested |
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| The external power supply is generally enclosed in the same cabinet as the island. | |
Devices |
| Usually the external power supply is a DIN |
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| For installations that require 72 W or less from a 24 VDC source power supply, we |
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| recommend a device such as the ABL7 RE2403 Phaseo power supply from |
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| Telemecanique, distributed in the United States by Square D. This supply is DIN rail- |
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| mountable and has a form factor similar to that of the island modules. |
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| If you have room in your cabinet and your 24 VDC power requirements are greater |
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| than 72 W, summable power supply options such as Schneider’s Premium |
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| TSX SUP 1011 (26 W), TSX SUP 1021 (53 W), TSX SUP 1051 (120 W), or |
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| TSX SUP 1101 (240 W) can be considered. These modules are also available from |
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| Telemecanique and, in the United States, from Square D. |
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890USE19600 April 2004 | 27 |