2.4 NK823x system limits
Network capabilities (upstream towards management system host)
⚫ 2 Ethernet interfaces IEEE 802.3, 10/100 Base-T with auto-negotiation,
half/full-duplex with auto-sensing, auto-crossover (thus eliminating the need for
crossover cables)
⚫ Single host transport protocols:
– CEI 79-5 type A and B, optional FEAL 64-bit encryption (NK8231, NK8232
and NK8235)
– CMSDL/IP (NK8232 and NK8235)
– BACnet/IP (NK8232 and NK8235)
⚫ Multiple hosts (max four hosts combined in total), transport protocols:
– Max. 4 CMSDL/IP (NK8231, NK8232 and NK8235)
– Max. 4 BACnet/IP (NK8232 and NK8235)
– Max. 3 Modbus TCP/IP (NK8232 and NK8235)
⚫ Redundant connectivity to hosts (dual Ethernet), transport protocols:
– CMSDL/IP (NK8232 and NK8235)
– CEI 79-5 type A and B, opt. FEAL 64-bit encryption (NK8232 and NK8235)
⚫ DHCP is currently not supported. A static IP address is required.
⚫ For security reasons, SNMP monitoring is not supported.
Serial capabilities (downstream towards subsystems and upstream
towards local management system host)
NK8235: The maximum number of serial lines is 4, allowing connection up to 4
local units (intrusion, access control, fire, gas detection, CCTV control units). Two
serial lines are available on the mainboard and two on an expansion module. The
serial lines can also be used for a local host, a dial-up host or a Modbus RTU
connection to a 3rd party Modbus master device.
NK8232: The maximum number of serial lines is 2 (on the mainboard). Only one
connection to a local unit (intrusion, access control, fire, gas detection, CCTV
control units) is allowed. The second line can be used for a local host, a dial-up
host or a Modbus RTU connection to a third-party Modbus master device.
NK8231: The maximum number of serial lines is 2 (on the mainboard). Only one
connection to a local intrusion unit is allowed. Only one Ethernet interface with CEI
79-5 upstream protocol is supported (no redundant connectivity to hosts).
In all NK823x models, two serial ports can be configured as an RS232 interface
using connector COM1 and COM2, or as an RS485 interface using connectors
X104 and X105. The NK8235 RS485 interface can handle up to 32 Modbus
devices.
LON bus connectivity
The NK823x Ethernet Ports do not have a LON interface. NK823x supports CS6
Guarto intrusion detection system via a USB network interface (see
Intrusion
Connectivity Guide
, document no.A6V10359489).
Interaction capabilities
NK8232 and NK8235 provide programmable interaction programs, including single
or multiple triggers (incoming events) and single or multiple effects (outgoing
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