Telex ISP-100 manual General Purpose Inputs GPI, Master Sync Input

If a permanent contact closure is used, the ISP-100 will remember the QuickSET selected even if the AC power fails.

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General Purpose Inputs (GPI)

Figure 2-17GPI connector pinout.

Dry (i.e. switch) or electronic (i.e. open collector) contact closure should be sufficient. The closure can be either momentary (10 ms minimum duration) or continuous. Connect the desired input (1-8) through the contact closure to common (9). See Figure 2-17 for more information.

Master Sync Input

Figure 2-18BNC cable example.

Synchronizing to an external clock source requires RG-58 or other suitable 50Ω cable terminated with a BNC connector. A precision (±5 ppm) clock source of 12.288 MHz, 6.144MHz, or 3.072 MHz is supported. The Master Clock Input must be set to external from the Properties for Merlin ISP-100panel in the VUE-IT software. See Figure 2-18 and page 7-6 of this manual for more information.

Setup & Installation