Instruction manual

Designing and Planning an M2150 System
12 Access Control Design Guide
Table 2-1: Port Usage Configurations
First (or only) database unit in chain
Last database unit in
chain (when there is
more than one
database unit)
Database
units
between
first and
last
5
COM C
RS232/
Modem to
PC
Fall-back
modem
2
Serial
Device
1
Serial
Device
1
Bi-directional
RS232
Comms
4
Serial
Device
1
Serial
Device
1
COM D
Serial
Device
1
LAN (NIC 4
or NIC-WI to
PC)
LAN (NIC 4
or NIC-WI to
PC)
LAN (NIC 4
or to PC)
Serial
Device
1
Bi-directional
RS232
Comms
4
-
COM E
-
Serial
Device
1
Fall-back
modem
2
LAN (NIC 4
or to PC)
3
- - -
Switch
Settings
P3 = OFF
P4 = ON
P5 = OFF
P6 = OFF
P7 = ON
P8 = ON
P3 = OFF
P4 = OFF
P5 = ON
P6 = ON
P7 = OFF
P8 = ON
P3 = ON
P4 = ON
P5 = OFF
P6 = OFF
P7 = OFF
P8 = ON
P3 = ON
P4 = ON
P5 = ON
P6 = ON
P7 = ON
P8 = ON
P3 = ON
P4 = OFF
P5 = OFF
P6 = OFF
P7 = ON
P8 = ON
P3 = ON
P4 = ON
P5 = OFF
P6 = OFF
P7 = ON
P8 = OFF
P3 = ON
P4 = ON
P5 = OFF
P6 = OFF
P7 = ON
P8 = ON
1
Optional. The port can connect to a serial device such as an ENVS.
2
Connecting an optional modem allows the database unit to use fall-back modem communications to the SMS PC if an
Ethernet comms failure is detected on COM D.
3
This gives dual NIC4 comms, and allows the secondary NIC4 module on COM E to be used if the network to the primary
fails.
4
This is used only for a direct RS232 connection between the last node of the chain and an SMS PC (for bidirectional
communications).
5
And for the first or last database unit in the chain if it uses an RS232-to-20mA converter.
Note: COM A and COM B are used for chains; COM B connects to COM A on the next database unit in the
chain.
LAN, Wireless or Serial Communications from First Database Unit
The first database unit in a chain can use wired or wireless network communications to the SMS
software. A NIC4 module must be used for wired LAN communications, or a NIC-WI for wireless
communications. The built-in RS232 port can be used if serial or modem communications with the
SMS PC is preferred.
There are two versions of the NIC4: one that does not use encrypted communications, and the other
that uses Rijndael (AES) encryped LAN communications (the US government approved encryption
standard). The NIC-WI module is a wireless version of the NIC4 and supports 802.11b 128-bit WEP
and WPA encryption.
Specify an IP address for each NIC4 and NIC-WI module. This is configured using the PC-based
configuration tool supplied with the SMS software, as described in the NIC Module Configuration
Guide.
Dual NIC4 LAN Communications
The M2150 range of controllers support the use of two NIC4 modules in a single database unit. The
secondary NIC module is used if the network connection to the primary fails.