Rockwell Automation 1753-DNSI DeviceNet Safety Scanner for GuardPLC Controllers - Manual (Page 25)

Publication 1753-UM002A-EN-P - July 2005
Install the 1753-DNSI 2-5
guidelines, refer to the Industrial Automation Wiring and Grounding
Guidelines, publication number 1770-4.1.
Connect Power Source Power for the module is provided via an external 24V dc power
source as well as from the DeviceNet cable. In North America, you
must use a power supply that is marked CLASS 2 per the requirements
of NFPA (National Electric Code) or CSA 22.1 (Canadian Electric Code,
Part 1). Outside of North America, you must use a Safety Extra Low
Voltage (SELV), or a Protected Extra Low Voltage (PELV) power supply
to power this module. A SELV supply cannot exceed 30V rms, 42.4V
peak, or 60V dc under normal conditions and under single fault
conditions. A PELV supply has the same rating and is connected to
protected earth.
Tighten power supply terminal
screws to 0.5 to 0.6 Nm
(4.4 to 5.3 in-lb.)
.
While some power is drawn
from the DeviceNet network, the
main power source is the
external power supply.
Make Communication
Connections
The scanner has two communication ports. The DeviceNet port is for
communicating on DeviceNet, allowing connections to up to 63
standard DeviceNet nodes and 32 DeviceNet Safety nodes. The HSP
port lets you communicate with a single GuardPLC 1600 or 1800
controller via a 1753-CBLDN cable.
ATTENTION
Do not connect or disconnect either communications
cable with power applied to this module or any
device on the network, because an electrical arc can
occur. This could cause an explosion in hazardous
location installations.