RTK Series 725 Annunciator
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17.2 SI/O Module Details
Systems that require common pushbutton control between multiple cabinets or larger units that
require additional power distribution terminals are supplied with the optional SI/O card. The SI/O
module is located in the bottom row of each annunciator in the system to provide the additional
connections required for logic power distributions and ribbon in / ribbon out connections as shown
below. Once the ribbon cables and logic power have been connected the units will respond as a
single common system. Please note the SI/O card can be fitted in addition to any alarm cards
already located within the cell.
Warning:-
A 24VDC supply should be independently connected to each annunciator unit within the scheme.
Power should not be daisy chained between units, which would cause excessive current to flow
within single units.
SI/O Ribbon And Power Connections
OUT
FRONT OF UNIT
VIEW UNDER SI/O MODULE
RIBBON FROM
ADJACENT UNIT
RIBBON TO
ADJACENT UNIT
24VDC LOGIC
SUPPLY
OV +V
CH*
FUSE
OV +V
RIBBON IN IN RIBBON OUT
OVC +VC
OVC +VC
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