of the RAS in the Address field. The RAS must be assigned to the
NAC and polled on the bus.
2. Address – if the device is connected to a DGP or RAS that is connected
to one of the NAC’s local buses, then the address of the DGP or RAS
must be specified.
DGP addresses from 1 to 15 are defined to be on Bus 1, and DGP
addresses from 17 to 32 are defined to be on Bus 2. (The DGP with
address 16 is the NAC itself.)
Similarly, RAS addresses from 1 to 16 are defined to be on Bus 1, and
RAS addresses from 17 to 32 are defined to be on Bus 2.
There can be 31 DGPs and 32 RASs attached to the NAC.
3. Device number – the device number (address) of the device attached to
the RAS, DGP, or NAC.
Note: The four onboard lock relays are treated as the first four relay numbers
assigned to the NAC. If a relay is connected to the NAC via an attached relay
controller board, then the relays are numbered from 5 onward. The number of
relay controller boards must be configured on the NAC options tab of the DGPs
form. See the “Relay controllers” option on page 44.
Note: If the Location is set to RAS or DGP, then the RAS or DGP must be
assigned to the NAC using the Assigned RAS or Assigned DGP tab of the DGPs
form, respectively, and must be polled. See the “Assigning RASs” section on
page 47, and the “Assigning DGPs” section on page 49 for more information.
Device locations example
The following example demonstrates the flexibility of specifying devices on the
NAC and on RASs or DGPs attached to its local buses, using a single door’s
attributes (inputs, relays, and readers). In this example, both local buses use the
Tecom protocol.
A single door can have two door inputs, an egress input, two lock relays, a DOTL
relay, a forced door relay, a warning relay, and up to six assigned readers. The
diagram in Figure 4 on page 20 shows devices attached to the NAC and
RASs/DGPs attached to its local buses that must be configured for use with the
door. Table 4 below shows how an operator would specify the device locations
when configuring the door.
Table 4: Door example
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