Step 2. Assemble The Devicenet Network - Control Techniques UD77 DeviceNet Startup Manual

5. Insert the 1747-SDN scanner into the rack. This guide recommends using slot 1, which is
right next to the SLC 5/0x processor slot.
6. Insert the Discrete I/O module into the next slot. Do not yet seat the module into the back-
plane connector. The initial RSLogix500 project file does not declare an I/O module, and
downloading a project file with undeclared modules fitted to a rack produces a major fault.

Step 2. Assemble the DeviceNet Network

1. Assemble the UD77 DeviceNet Module(s) and fit the assembly into each respective
Unidrive.
A. Fit one UD77TB DeviceNet open-style terminal connector to each UD77 Coprocessor.
B. Insert the assembled Co-processor into the large option bay in each Unidrive.
2. Continue to insure incoming power is turned off, and mount and properly earth ground each
Unidrive as appropriate.
3. Continue to insure incoming power is turned off, and connect the input voltage and control
connections to the Unidrive. Then connect the motor leads as described in the Unidrive
Installation and User's Guide.
A. For a development and evaluation DeviceNet network that is not fitted with any AC
Motors, or is only operating the AC Motors unloaded, the Unidrive(s) can be adequately
powered via a fused, single phase 415 to 460 VAC supply. Operation without motors is
normally done only in open loop mode on the Unidrive.
B. Practical networks on real control systems driving real motor loads have the Unidrive(s)
powered via fused 460 VAC 3 phase supplies following guidelines set out by the NEC
(or equivalent jurisdiction) regarding the details concerning wiring conductor size,
insulation type, and over-current protection requirements. This guide does not provide
further guidance on this subject.
C. A development and evaluation DeviceNet network requires a jumper or a single pole
single throw switch controlling continuity from terminal 31 to terminal 30 (Drive enable)
on each Unidrive as the minimum control connection required for useful operation. This
means one jumper or switch for each Unidrive.
D. Practical networks on real control systems driving real motor loads have Emergency
Stop / Reset logic in hardwired relay ladders that provide a contact to each Unidrive to
control continuity from terminal 31 to terminal 30. This means one normally open
contact for each Unidrive, closed in a no-fault (reset) condition.
4. Mount the 1770-KFD DeviceNet interface.
A. For most network configuration(s) the 1770-KFD Interface can take its power from the
DeviceNet network 24 Volt supply.
B. A separate 9.0 Volt DC supply just for the Interface is only needed if the DeviceNet
Interface is connected to the network via isolating taps and network +24 Volts DC is not
available to the 1770-KFD interface. Continue to insure power is off, and connect the
DeviceNet devices together using the appropriate DeviceNet cabling.
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