ABB CI626V1 3BSE012868R1 Redundant communication interface

Description

The communication interfaces CI520, CI522 and CI526 use TC625 as external modems while
CI626 has integrated coaxial media modems. The modems are able to drive a 700 meter
(2,300 ft.) of 75 ohms coaxial cable with 80 AF 100 Stations connected.
The modems are galvanically isolated from the communication interface. The modems are
HF/HV grounded through a capacitor. Furthermore, the Advant Fieldbus 100 must be grounded,
but only in one end. If redundant cables are used they should be grounded in the same place
(see Section 4.3.2, Installing Coaxial Cable).
The Communication Interface CI520V1, CI522, CI526V1 and CI626V1 can handle two
redundant bus cables (see Section 4.3.1.9, Installation of Redundant Twisted Pair Bus) but
CI520V1, CI522, CI526V1 and CI526 must have one modem (TC625) per bus cable.
Each station connection consists of two bus cables, one drop cable and a BNC T-connection.
One bus cable leading to the next communication interface, one to the previous communication
interface and the drop cable leading to the actual node.

Electric characteristics of the Advant Fieldbus 100 coaxial cable interface:
• Output voltage 6.3…7.3 V
• Output current max. 0.4 A
• Input voltage 4.0…7.3 V
• Input impedance typical. 50 kohm
• Test voltage 500 Vrms/1 min.
Coaxial bus cable:
• Coaxial cable 75 ohms RG59 or RG11
• Cable diameter 7 mm (RG59), or 11 mm (RG11).
• Cable length max. 300 m (1,000 ft.) (RG59),
700 m (2,300 ft.) (RG11)
• Maximum number of stations per segment 80
• Maximum difference in redundant cables 1,200 m (4,000 ft.)
length between any two stations on the bus.
For connection of communication interfaces and modems to Advant Fieldbus 100 and
termination of Advant Fieldbus 100 there are special connection and termination kits

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