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Chapter 2, installation and wiring, Before you begin, Power requirements – Rockwell Automation 1790P-T4T0 CompactBlock LDX I/O Thermocouple Modules User Manual

Page 15: Chapter 2, Installation and wiring, Before you begin -1 power requirements -1, 1790d-4t0/t4t0 -1 1790p-t4t0 -1, Chapter

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Publication 1790-UM003A-EN-P - May 2002

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-4T0/T4T0

The module receives system power from the DeviceNet network. An
auxiliary field supply provides power for the thermocouple/mV
channels.

1790P-T4T0

The module requires external supplies for both system power and 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

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