Ross ACO-4400A, User Manual, Page: 30 / 112

2–12 • Physical Installation ACO-4400A User Manual (Iss. 03)
Connecting Power
The ACO-4400A operates from a single-phase power source with the neutral conductor at or near
earth ground. The line conductor is fused for over-current protection. A protective ground
connection through the grounding conductor in the power cord is essential for safe operation.
Safety earth studs are also provided for earth bonding the chassis if you so require.
You need to provide two power connections. For full power security, these should be on separate,
independent and secure power grids. However, you still gain the security of power supply failure
redundancy if you use the same power grid for both connections.
AC Power Requirement
Check that your location provides the proper electrical power requirements as listed in Table 2.2 .
Connecting the Power Cable
Connect the power cable to the instrument first, and then connect it to the AC power source. Note
that connecting a live power cable causes the instrument to power on.
Table 2.2 AC Line Power Requirement
Parameter Description
Line Voltage Range 100-240V
Line Frequency 50/60Hz
Maximum Power (Dual PSU) 46VA (21W) - calculated
<130mA @ 230V
<200mA @ 120V
Each PSU
Caution
— The ACO-4400A does not have a power switch. Removing the power supply
cord(s) disconnects the device from the mains power. Ensure easily accessible socket outlets
are available near the ACO-4400A to power the unit.
Caution
— If two entry connectors are preset on the rear panel, the ACO-4400A will still be
powered until both power cords are removed.