ITX 3000/2000 Printer User Manual
(UMITX315.PDF
)
Page 54 of 82 Date: 4/27/05
13
POWER SUPPLY INFORMATION
13.1
Power supply D.C. Output Cable
The ITX Series Printer uses an external, 24V, 60 watt power supply. This power supply is connected to the printer by a shielded
DC power cable with a 5-pin circular DIN input connector on its output. This cable mates to the printer's 8 pin circular DIN
mounted on the on the rear panel of the printer. The pin-out for both connectors is shown below. Note only the first five pins
are active for the 60 Watt power supply.
PIN #
SIGNAL TITLE
SIGNAL DESCRIPTION
NOTES
1 POWER
GROUND POWER
RETURN
2 POWER
GROUND POWER
RETURN
3
+24 VDC
POWER INPUT
+24 VDC @ 2.3A Avg.
4 POWER
GROUND POWER
RETURN
5
+24 VDC
POWER INPUT
+24 VDC @ 2.3A Avg.
6
POWER GROUND
POWER RETURN
Not Used
7
+24 VDC
POWER INPUT
Not Used
8
+24 VDC
POWER INPUT
Not Used
SHELL
CHASSIS GROUND
Chassis ground-power cable shield connection
13.2
Power Management
The ITX printers are budgeted to operate from a power supply of 60 average watts. The short-term power demands can be
significantly higher than 60 watts. To provide for this, the printer controller has a large input capacitor reservoir. Also, it uses
on-the-fly power management. The power management scheme takes advantage of the switching power supply's characteristic
of being able to deliver high short-term power demands. It then forces average power compliance over time.
13.3
Power Supply Requirements
OUTPUT
VOLTAGE:
24VDC
(TOL.
±5%
Max)
OUTPUT CURRENT(Min):
0.0A (Average)
OUTPUT CURRENT(Max):
2.3A (Average)
OPERATING TEMPERATURE:
50º C (Max)
INPUT
VOLTAGE:
90
TO
264
VAC
PRINTER LOAD CAPACITANCE:
10,000 uF
INRUSH CURRENT:
8A Into 10,000 uF
PRINTING POWER:
75w (Max) – 5 seconds
SHORT TERM POWER:
100w (Max) - 20 mSEC (Max).
AVERAGE
POWER:
60w
(Max)
IDLE
POWER:
4w
(Nominal)
13.3.1
Power Supply Additional Requirements
The DC output cable connection to the printer must be a shielded cable. The load of the printer presents a rapidly changing,
pulsed current drain to the attached power supply. When designing or selecting an alternate power supply this dynamic load
must be taken into consideration. The printer system’s EMI/EMC and safety compliance are referenced to the power supply
provided by Practical Automation. The power supply must have short circuit and fault energy limit protection to comply with
the required safety standards. It is the responsibility of the system engineer, when changing to an alternate power supply, to
insure continued functional, safety and EMI/EMC compliance is maintained.