Echelon DM-21 Device Manager - Manual (Page 50)

4-10 Device Manager Hardware Description and Installation
Table 4.6 – Status LED
5 The Device Manager object is disabled or the DM MODE has been set
to disable discovery or commissioning.
4 No database is selected.
3 The Device Manager is commissioning itself.
2 One or more permanent devices have not been
discovered/commissioned.
1 The Device Manager has determined that all permanent devices have
been correctly installed (commissioned).
0 The Device Manager application is not running (offline, unconfigured).
The status interval is a 3-second cycle with a flash rate of 200 ms on, 200 ms off.
For example, when all nodes are properly commissioned and the DM-20/21 is
functioning properly, there will be one 200 ms pulse every 3 seconds.
Power Supply—DM-20
The DM-20 must be powered from 5VDC@150mA.
Power Supply—DM-21
The DM-21 must be powered from 16-30V AC or DC @ 2.4VA.
Installing the DM-20 Module
To install the DM-20 module, follow these steps:
1. Follow the node configuration procedure described in Chapter 5 to configure
the software in the DM-20 module.
2. Ensure that the motherboard has been wired and installed correctly, and is
securely fastened to its electrical enclosure. Ensure that the motherboard
provides the proper signals to the DM-20 for subsystem selection.
3. Check for continuity on all network and power wiring. Ensure that the
correct devices are connected to the network and that all devices can be
uniquely identified by Program ID/Location String.
4. Make certain that all network channels are terminated with the correct
number and type of Terminator.
5. Wear a properly-connected ESD protection strap while handling the DM-20
module.
6. Insert the DM-20 module into the motherboard by aligning the network
access jack on the DM-20 with the mating connector on the motherboard.
The DM-20 should be affixed using the proper .75 inch standoff. See The DM-
20 Device Manager Hardware Interfaces, earlier in this chapter, for
information on which standoffs should be connected to digital ground, and
which standoff should be connected to chassis ground.