Instruction Manual

1 Publication 1790-UM002A-EN-P
Chapter 2
Installation and Wiring
Before You Begin
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
Power Requirements
1790D-4R0/T4R0
The module receives system power from the DeviceNet network. An
auxiliary field supply provides power for the RTD/resistance channels.
1790P-T4R0
The module requires external supplies for both system power and for the
RTD/resistance channels.
Table 2.1 1790D-4R0/T4R0 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
Table 2.2 1790P-T4R0 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