1.4 Specifications
1.4.2Characteristics
Terminal Equipment Loop Limit | • PT: |
| • SLT: 600 Ω including set |
| • Doorphone: 20 Ω |
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Minimum Leakage Resistance | 15 000 Ω minimum |
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Maximum Number of Extension | 1 for PT or SLT |
Instruments per Line | 2 by Parallel or eXtra Device Port connection of a PT and an SLT |
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| 3 by Digital eXtra Device Port connection of 2 DPTs and an SLT |
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Ring Voltage | 75 Vrms at 20 Hz/25 Hz depending on the Ringing Load |
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Central Office Loop Limit | 1600 Ω maximum |
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Hookswitch Flash Timing Range | 24 ms to 2032 ms |
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Door Opener Current Limit | 24 V DC/30 V AC, 1 A maximum |
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External Relay Current Limit | 24 V DC/30 V AC, 1 A maximum |
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External Sensor Current Limit | Power to the external sensor is provided from the DPH4 card and must be |
| grounded through the DPH4 card. For the connection diagram, refer to |
| "2.5.1 DPH4 Card |
| the sensor when the signal is under 100 Ω. |
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Paging Terminal Impedance | 600 Ω |
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MOH Terminal Impedance | 10 000 Ω |
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Installation Manual
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