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Before You Begin
Power Requirements
1
Installation and Wiring
This chapter tells you how to:
• determine the power requirements for the modules
• avoid electrostatic damage
• install the module
• wire the module's terminal block
1790D-4T0/T4T0
The module receives system power from the DeviceNet network. An
auxiliary field supply provides power for the thermocouple/mV
channels.
Table 2.1 1790D-4T0/T4T0 Power Specifications
Power
Specification
DeviceNet
Supply voltage - 24V dc nominal
Voltage range - 11-28.8V dc
Power dissipation - 1.2W maximum @ 28.8V dc
Field
Supply voltage - 24V dc nominal
Voltage range - 21.6-26.4V dc (+10%)
Power dissipation - 1.5W maximum @ 26.4V dc
1790P-T4T0
The module requires external supplies for both system power and for
the thermocouple/mV channels.
Table 2.2 1790P-T4T0 Power Specifications
Power
Specification
PROFIBUS
Supply voltage - 24V dc nominal
Voltage range - 19.2-28.8V dc
Power dissipation - 2W maximum @ 28.8V dc
Field
Supply voltage - 24V dc nominal
Voltage range - 21.6-26.4V dc (+10%)
Power dissipation - 1.5W maximum @ 26.4V dc
AB Drives
Chapter
Publication 1790-UM003A-EN-P - May 2002
2
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