Apollo AAN-4, Hardware Manual

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20 System Wiring
© 2011 Apollo Security Inc.
25-Pin COM Port Connector
(front view)
Tx Rx SG
R+ SG T+ T- R-
SG Tx Rx
9-Pin COM Port Connector
(front view)
Figure 3.3.1 Host to AAN-4 Serial Wiring Pinouts (RS-232).
The wiring from the host to the panel
must be done according the type of host port (RS-232 or RS-485, 9-pin or 25-pin) and then properly
connected to the Host Communication Connection. Refer to the Terminal Connector table for position of the
required RS-485 connections.
3.3.2 Network
For connection from the host to the AAN-4, an ENI-100 Network Interface Module is used. The ENI-100 acts
as a standard Ethernet network device and occupies one IP address (see Part 4 for programming
instructions). The connection from the ENI to the network is made by a standard RJ-45 jack. A standard UTP
network cable should be connected from the ENI-100 to the local network via a network switch, hub or other
network connection device. The ENI communicates at 10/100Mbps with the TCP/IP protocol. The IP address
of the ENI should be specified in the host software and the host will initiate communications with the ENI,
which will translate the messages to the AAN-4.
Routing with ENI-100: If the ENI has an IP address that is not on the same subnet as the host computer,
there is no need to program a gateway in the ENI as it does not originate communication in this
configuration. If the proper network path is established from the host to the ENI, (including necessary
gateways) the ENI will receive the communication from the last router or gateway in the path. This router or
gateway will deliver the message to the ENI with the IP address of the host computer, but with the router or
gateway’s own MAC address. The ENI will reply to the IP of the host computer, but directed to the MAC
address of where the message originated (the router or gateway). The reply will then be sent by the router or
gateway on the correct path back to the host.