Centronics 306 Technical Manual page 216

84. POWER INPUT AND GROUNDING SPECIFICATIONS
Input Voltage
Voltage requirements for the printer are:
115 VAC !10%, 60 Hz or,
230 VAC ±10%, 50 Hz
The printer shall be independently connected to the primary power
source by means of a 3-wire grounded outlet and shall contain conversion. reg-
ulation, and sequencing equipment required for correct performance.
The turn-on surge current in all Centronics printers takes the form
of a decaying exponential waveform. with approximately a 250 millisecond
time constant. The values of the initial surge current and the steady state
operating current (with the printer not printing) are shown in the following
table.
Operating Current
Model Surge Current (with printer not printing)
101/101A
48 amps (max. peak to peak)
2.8 amps (RMS)
102A
52 amps (max. peak to peak) 3.3 amps (RMS)
306
28 amps (max. peak to peak) 2.3 amps (RMS)
Equipment Ground
The green wire (building ground) of a power cable for the printer shall be se-
curely fastened to the frame. The white wire (neutral AC) shall not be
grounded to the frame.
D.C. Ground
The return wire of the interconnecting line. twisted pair shall be grounded to
the DC ground. This connection shall be made as close as practical to the signal
source and load.
8-5/8-6
Rev. E