Omega-vehicle-security LDN-PS Manuel d'utilisateur télécharger pdf (Page 24)

PSIM-AC PSIM-DC PSIM-5V

The PSIM-5V is powering the whole Orbit Network. PSIM-5V volt drop is calculated using 12 as the total number of

Orbit modules; the RS232IM is included in this number.

Total Voltage drop = PSIM-5V + modules (6 off) + Cable 1 + Modules (6 off)

= (2 x 12 x [3+1]) + 0.04 (1+2+3+4+5+6+7+8+9+10+11+12)+ (15.2 x 6) + 0.04

(1+2+3+4+5+6)

= 96 + 3.12 + 91.2 + 0.84

= 191 mV

Then approximate voltage at end of network = nominal supply voltage - calculated volt drop

= 5.25 - 0.191

= 5.06 V

i.e. greater than 4.75 Vdc the minimum working voltage. In this example the input supply to the PSIM-5V could be

reduced to 5.1 V (the Orbit nominal value).

7.0: Applications (continued)

LDN-PS

M-3340/1206

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Omega-vehicle-security LDN-PS Manuel d'utilisateur Page 24