ATLAS 550 System Manual Section 2 Engineering Guidelines61200305L2-1B © 2004 ADTRAN, Inc. 271. EQUIPMENT DIMENSIONSThe ATLAS 550 base unit dimensions are 17.08” W x 11.67” D x 3.47” H. The option modules fit insidethe base unit.2. POWER REQUIREMENTSThe ATLAS 550 has a maximum power consumption of 60 W and a maximum current draw of 2 A(AC System) or 5 A (DC System) regardless of the configuration of option modules installed in the baseunit.3. REVIEWING THE FRONT PANEL DESIGNThe front panel contains the Alarm Cut-off switch (ACO), the CRAFT port, and the status LEDs for thesystem controller, the network modules, and the option modules. Figure 1 identifies the ACO switch, theCRAFT port, and the LEDs.Figure 1. ATLAS 550 Front Panel LayoutACO SwitchPressing the ACO switch deactivates (clears) the Alarm Relay, located on the back panel of theATLAS 550, after an alarm condition has occurred. If an alarm condition is corrected and then reoccurs,the Alarm Relay re-energizes.CRAFT Port (DB-9, female)Use the CRAFT port to configure the system via an EIA-232 connection. Table 1 on page 28 gives theCRAFT port pinout.NetworkModule LEDs Option Module LEDsCraftPort ACOSwitchSystem StatusLEDs
