Manual
ibaLink-VME
14
Issue 1.8
Channel 2: X20 TX (8)
X20 TX realizes the second fiber-optic transmitter (channel 2).
X20 can be used as the second channel output in 3Mbit mode. When working in other
modes the X20 output is a copy of the channel 1 output (X10). X20 can be used for
diagnostics.
Maximum distance of fiber optic connections
The maximum distance of fiber optic connections between 2 devices depends on various
influencing factors. This includes, for example, the specification of the fiber (e.g.
62.5/125
μm, 50/125 μm
, etc.), or the attenuation of other components in the fiber optic
cable plant such as couplers or patch panels.
However, the maximum distance can be estimated on the basis of the output power of
the transmitting interface (TX) or the sensitivity of the receiving interface (RX). A model
calculation can be found in chapter 11.3.
The specification of the transmitter's output power and the receiver's sensitivity of the
fiber optic components installed in the device can be found in chapter 11.1 "Technical
data" under "ibaNet interface".
7.1.2
Rotary switches
S1 „Mode“ (2)
This switch sets the mode of operation for the ibaLink-VME interface card. The modes
of operation vary in the used ibaNet protocol, the transmission rate, size and format of
the telegrams.
See chapter 7.2 “Operation modes”.
S2 “Range” (6)
In 3Mbit cascading mode the range switch specifies the range of channels within a cas-
cade to be transmitted over the fiber-optic link.
See also section 7.2.1 and 9.3 ”Cascade Mode 3Mbit”.
In 32Mbit P2P mode the range switch is used to select the FO telegram type.
See also section 7.2.5 “ibaNet 32Mbit P2P (mode 4)”.
In 32Mbit Flex mode the range switch is not used.
S3 “Address” (7)
In 3Mbit mode this switch defines the starting position of the local data in the daisy-
chain. Valid values: 1…8. If channel 1 is not operating in daisy-chain mode the switch
setting should be 1.
See also section 7.2.1 and 9.3 ”Cascade with 3Mbit mode”
In 32Mbit Flex mode the address switch specifies the address of the device within a ring
topology of 32Mbit Flex enabled devices. Possible settings: 1…F.
See also section 7.2.6 and 9.4 “Cascade with 32Mbit Flex”.
Default settings of the rotary switches:
S1 Mode: F (32Mbit Flex mode)
S2 Range: 0
S3 Address: 1
