Rockwell Automation 1790D-NOV2/TNOV2 CompactBlock LDX Analog Modules - Manual (Page 17)

1 Publication 1790-UM001A-EN-P - March 2002
Chapter
2
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
•
wire input devices
•
wire output devices
Power Requirements The modules receive power through the DeviceNet network and from
an auxilary 24V dc field supply. The maximum power drawn by the
modules is shown in Table 2.1.
Module Installation CompactBlock LDX is suitable for use in an industrial environment
when installed in accordance with these instructions. Specifically, this
equipment is intended for use in clean, dry environments (Pollution
degree 2
(1)
) and to circuits not exceeding Over Voltage Category II
(2)
(IEC 60664-1).
(3)
Table 2.1
CompactBlock LDX Module Power Requirements
Voltage Range: Power:
DeviceNet Power: 11-28.8 V dc 1.2W @ 28.8V dc
Auxilary 24V dc Field Power: 21.6-26.4V dc 1.5W @ 26.4V dc
(1)
Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that
occasionally a temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient
voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3)
Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)
designations.