B.1 North American Classification of Hazardous Locations, Continued
Apparatus | The Intrinsically Safe Apparatus Parameters are defined as follows. | |
Parameters |
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| Parameter | Description |
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| Vmax | Maximum safe voltage which can be applied to the apparatus |
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| terminals. |
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| Imax | Maximum safe current which can be applied to the apparatus |
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| terminals. |
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| Ci | Unprotected capacitance in the apparatus which can be |
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| considered present at the terminals. |
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| Li | Unprotected inductance in the apparatus which can be |
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| considered present at the terminals. |
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The Associated Apparatus Parameters are defined as follows.
| Parameter | Description |
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| Voc | Maximum output voltage which can be delivered to the |
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| hazardous (classified) location. This voltage is the maximum |
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| from a single channel. |
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| Isc | Maximum output current which can be delivered to the |
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| hazardous (classified) location. This current is the maximum |
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| from a single channel. |
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| *Vt | Maximum output voltage which can be delivered to the |
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| hazardous (classified) location. This voltage is the maximum |
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| across any combination of terminals of a multiple channel |
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| configuration. |
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| *It | Maximum output current which can be delivered to the |
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| hazardous (classified) location. This current is the maximum |
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| through any combination of terminals of a multiple channel |
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| configuration. |
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| Ca | Maximum capacitance which can be connected to the |
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| apparatus. |
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| La | Maximum inductance which can be connected to the |
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| apparatus. |
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| *CSA does not recognize these parameters at this time. | ||
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| Continued on next page | |
86 | ST 3000 Release 300 Installation Guide | 2/05 |