Publication 1764-UM001B-EN-P - April 2002
A-2 Specifications
Choosing a Power Supply
This section contains information for selecting a power supply for
applications using a 1764-28BXB base unit. Use the tables in
Appendix F to calculate the total power (Watts) consumed by the
system. With that information, use the graphs below to chose a power
supply. You can use either current or power, depending on how the
power supply is rated.
Figure 1.1 Input Current Required
Electrical/EMC The module has passed testing at the following levels:
• EN61000-4-2: 4 kV contact, 8 kV air, 4 kV indirect
• EN61000-4-3: 10 V/m
• EN61000-4-4: 2 kV, 5 kHz; communications cable: 1 kV, 5 kHz
• EN61000-4-5: communications cable1 kv galvanic gun
-I/O: 2 kV CM, 1 kV DM,
-Power Supply (1764-24AWA/1764-24BWA): 4 kV CM, 2 kV DM
-Power Supply (1764-28BXB): 0.5 kV CM, 0.5 kV DM
• EN61000-4-6: 10V, communications cable 3V
Terminal Screw
Torque
1.13 Nm (10 in-lb) rated; 1.3 Nm (12 in-lb) maximum
Programming
Software
For 1764-LSP Series A Processors: RSLogix 500,
Version 3.01.09 or higher
For 1764-LSP and 1764-LRP Series B Processors: RSLogix 500,
Version 4.00.00 or higher.
(1) Recommended storage temperature for maximum battery life (5 years typical with normal operating/storage
conditions) of the 1764-RTC, 1764-MM1RTC, and 1764-MM2RTC is -40°C to +40°C (-40°F to +104°F). Battery
life is significantly shorter at elevated temperatures.
(2) See Choosing a Power Supply on page A-2.
Table A.1 General Specifications
Description 1764-24BWA 1764-24AWA 1764-28BXB
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 2 4 6 8 10 12 14 16 18
Input Current Required at 24V dc (Amperes
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