Use additional Power Supply in 2-wire System - Schick Handel

Use additional Power Supply in 2-wire SystemIn some installations, if the cable is too long or it is not thick enough to provideenough voltage for each device, you may need additional Power Supply to makethe system works properly.Note: Try to adjust the PS5-24 voltage (Normally the voltage should be adjust to26V) to highest (about 27V), to check if system works. If not, you should consideruse additional Power Supply.For Monitors which are far away from the Power Supply, if being called or operatemonitoring, they may turn off quickly and re-power on again. This is because ofthe voltage drop caused by long cable. Although the Monitor input voltage is morethan 20V in standby situation, however, turn on the Monitor will make the voltagemuch lower.Generally, the required voltage of Monitor is about 20V after turn on, this dependson different models, the range is from 18 to 22V. Monitor with larger TFT screenwill need higher voltage.General rules for additional Power Supply:* Only PS5-24(NES-100) can be used for main and additional power supply* One DT-DPS (Power Separator) is also needed, and must be inner modified first* Additional Power Supply should be installed near the end of the cable* To avoid interference, connect the Earth Ground tightly.* Although the system features non-polarity, actually in the bus, power positiveand negative are still present, additional power supply must be connect accordingto the power polarity.* Adjust both PS5-24 to have same output voltage, the difference in betweenshould be less than 0.5V voltage.* Multi Meter is needed in field, to adjust the voltage and identify the bus polarity.Steps for install additional Power Supply1. Modify DT-DPS, disassemble the bottom cover, and cut one side of R201Resistor (22Ohm, 2W), and then reassemble and label it.Cut one side of R201

Mode 1. Basic IN-OUT wiring ModeDABCODE=3,DIP-6=CODE=2,DIP-6=OFFECAdditional Power SupplyCODE=1,DIP-6=OFFNotice Points:ABMain Power SupplyABCMeasure the output voltage of 2 powersupplies, make sure the difference is lessthan 0.5VTerminal of PS5-24 should beconnected to the Earth GroundFor additional DT-DPS, BUS(IU) is used,and do not connect the BUS(DS)DThe additional DT-DPS should be modifiedENotice this jiont connection is withpolarity. Identify the P+ and P- withmultimeter and make sure P+ areconnceted together, P- are connectedtogether