Rockwell Automation 1738-EP24DC ArmorPoint I/O 24V dc Expansion Power Supply - Manual (Page 7)

Publication 1738-IN020A-EN-E - June 2004
ArmorPoint I/O 24V dc Expansion Power Supply, Series A 7
Specifications Following are specifications for the 1738-EP24DC power supply.
1738-EP24DC Power Supply
I/O Module Capacity
5 to 17 I/O modules depending on each module’s current rating.
Power Supply In order to comply with CE Low Voltage Directives (LVD), you must use a Safety
Extra Low Voltage (SELV) or a Protected Extra Low Voltage (PELV) power supply to
power the adapter.
Inputs Voltage Rating 12V dc, 24V dc nominal
10-28.8V dc range
Operating Voltage 10-28.8V dc
Input Current, Maximum 6A for 10ms
Backplane Output Current 5V dc, 1.3A
Field Side Power Requirements, Maximum 24V dc (+20% = 28.8V dc) @ 400mA
Indicators 1 Green Field Power Status Indicator
1 Green 5V System Power Indicator
Module Location Between I/O modules in 1738 system
Breaks field power bus
PointBus Output Current 1 A at 10-19.2V input; 1.3 A at 19.2-28.8V input
Input Overvoltage Protection Reverse polarity protected
Interruption Output voltage will stay within specifications when input drops out for 10ms at
10V with maximum load
General Specifications
Power Consumption, Maximum 9.8W @ 28.8V dc
Power Dissipation, Maximum 3.0W @ 28.8V dc
Thermal Dissipation, Maximum 10.0 BTU/hr @ 28.8V dc
Isolation Voltage
(continuous-voltage withstand rating)
50V rms
Tested at 1250V ac rms for 60s
Field Power Bus
Supply Voltage
Voltage Range
Supply Current
12V dc, 24V dc nominal
10-28.8V dc range
10 A maximum
Dimensions Inches (Millimeters) 1.25H x 2.63W x 4.25D (31.75H x 66.80W x 107.95D)
Operating Temperature IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20 to 60°C (-4 to 140°F)
Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat),
-40 to 85°C (-40 to 185°F)
Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating Damp Heat):
5-95% non-condensing
Shock IEC60068-2-27 (Test Ea, Unpackaged Shock):
Operating 30g
Non-operating 50g
Vibration IEC60068-2-6 (Test Fc, Operating):
5g @ 10-500Hz
ESD Immunity IEC 61000-4-2:
6kV contact discharges
8kV air discharges