Addressable Gas Detection System Manual
Addressable System Manual
15
Issue 2, January 2015
2.3.1)
Relay Module
The 8-relay expansion board converts the open-collector outputs from the addressable
output module into voltage free changeover contact. Up to two relay boards can be
connected to each output module. A relay board is directly connected to the output module
(J1 connector) and a second relay board is connected to the first.
Fig. 2.4.1 Relay board connection to the output module
2.3.2)
Module addressing
Modules are addressed using the two rotary switches in RSW 1 and 2 hexadecimals
(fig. 2.5). Rotary switches permit hexadecimal settings (base 16). Each switch as 16
positions (0-F) and the pointer is positioned on the number chosen using a
screwdriver to create a decimal value between 1 and 255 (see table 1). The
maximum number of modules that can be connected to the unit is 16.
Each module must have unique address in the system. Dual addresses are not
permitted even if modules are on different serial buses.
Esempio collegamento
/ Connection example
Out 1
Out 2
Out 3
Out 4
Out 1
Out 9
Out 10
Out 11
Out 12
Out 8
Out 7
Out 6
Out 5
Out 16
Out 13
Out 15
Out 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Open Collector outputs
NC C NO
NO C NC
NO C NC
NC C NO
ST.G/OUT16 Module
