Operating instructions

Connecting
6.2 Connecting the 120 V / 240 V Ac power supply
SIMATIC Panel PC 677B
42 Operating Instructions, 05/2007, A5E01035609-01
Note
The power supply contains an active PFC (Power Factor Correction) circuit to conform to the
EMC guidelines.
Uninterruptible AC power systems (UPS) must supply a sinusoidal output voltage in the
normal and buffered mode when used with SIMATIC PCs with an active PFC.
UPS characteristics are described and classified in the standards EN 50091-3 and IEC
62040-3. Devices with sinusoidal output voltage in the normal and buffered mode are
identified with the classification "VFI-SS-...." or "VI-SS-....".
Localized information
For countries other than the USA and Canada:
240 V supply voltage
This device is equipped with a safety-tested power cable which may only be connected to a
grounding outlet. If you choose not to use this cable, you must use a flexible cable of the
following type: Min 18 AWG conductor cross-section and 15-A / 250-V shockproof connector.
The cable set must be compliant with the safety regulations and stipulated IDs of the country
where the system is to be installed.
For the USA and Canada:
For the United States and Canada, a CSA or UL-listed power cord must be used.
The connector must be compliant with NEMA 5-15.
120 VAC power supply
Use a flexible power cord which is approved to UL and CSA, and which has the following
features: Type SJT with three leads, min. 18 AWG conductor cross-section, max. 4.5 m in
length and parallel ground contact connector 15 A, min. 125 V.
240 VAC power supply
Use a flexible power cord which is approved to UL and CSA, and which has the following
features: Type SJT with three conductors, min. 18 AWG conductor cross-section, max.
length 4.5 m, and tandem grounded connector 15 A, min. 250 V.