Deployment
2 Deployment
2.1 In tallation recommendation
Follow these guidelines regarding shielded cables:
✓Only use shielded cables when the installation environment requires it.
✓No need for shielded cables between modules, if installed in close proximity
✓Connect shield to chassis ground at only one end of the cable.
For RS485 communication, the terminal Nis only required between systems not sharing the same ground
potential. When used, do not connect it to the cable screen. Note that it may be a single wire, but must be
drawn together.
When the cable length is less than 30 m in RS485, a terminator is not required in normal cases. The use of
terminators will decrease signal integrity thus try without first. When used, match the terminator value to
the characteristic impedance of the cable.
NNoottee!! Do not mix and u e one GND for everal input .
The technical earth terminal in the IO module power connector i not intended a a connection for
cable creen .
When connecting and measuring an external transmitter in an UI port this is done between terminals UIx
and GNDx (where x is the channel number between 1…16). Note that the intention is to use the
corresponding GND for the connected UI, especially when measuring sensitive signals or using DI pulse
(fast) mode.
Wiring examples can be found under each specific Add:io model in the following chapters.
2.2 General tatu indicator
The Add:io has a general status indicator mounted at the middle right front side, see Figure 1-1, which can be
inspected both when the unit is mounted on its bac and side. This indicator changes colour depending on its
actual status as shown in Table 2-1.
Table 2-1 Status indication at the front
LED status Controller status
Green, solid Power on and communication is established
Red, solid Battery problem
Yellow, blink 2.5 Hz Identification (wink)
Orange, blink 1 Hz IO-board is not in contact with CPU-board (via EFX)
The status indications that are present on the side, see Figure 1-1, are only active when the universal inputs or
outputs are configured as DI and DO. The indicator colours are shown in Table 2-2.
Table 2-2 Status indications on the side
UI configuration LED colour IO status
DI Green ON
DO Yellow ON
8 Add:iomanual, Rev. A
