Host Rs232-485 Ports (Modbus Output); Ethernet Ports - Honeywell CIU 888 Installation Manual

CAUTION! The optional ports are galvanically isolated and the fixed Host
Part No.: 4417590_Rev13
Electrical Installation - Host RS232-485 Ports (MODBUS Output)

3.5 Host RS232-485 Ports (MODBUS Output)

The Host Ports (MODBUS Host Ports) can be found on the rear of the
CIU 888 and these can be configured for either RS-232C or RS-485.
Refer the sections 3.4.3.1 "Field RS232-485 Port in RS232C mode
[Part of a future release]" and 3.4.3.2 "Field RS232-485 Port in RS485
mode" for more information regarding the field ports RS-232C and RS-
485.
Also, see the section 3.3 "CIU 888 Interface Summary" for locating the
ports.
Ports are not galvanically isolated.

3.6 Ethernet Ports

CIU 888 has 6 Ethernet ports, one on front side and 5 on rear side of
CIU 888. All ports are 10/100 Mbps compliant and support Auto MDIX
support (auto detects Straight or Cross cable and switches accordingly).
See the section 3.3 "CIU 888 Interface Summary" for locating the ports.
Front Side Port:
Service Port - This port is used for debugging and diagnostic purposes.
Rear Side Ports:
Sync Port - This port is required in a redundancy setup and is used to
sync between two CIU 888s (primary and secondary)
Office LAN - This port is used to connect to Office LAN
VPN Port - This port supports secure remote access. [Part of a future
release]
FTEA and FTEB Ports - Fault Tolerant Ethernet ports.
Ethernet Cable Specification:
Cable Type: CAT5

Frequency: 100 MHz

Characteristic Impedance: 100
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CIU 888
Installation Manual
+/-15%
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