User guide

System Hardware
4.2.3 Connections to EAU-341
All connections are made to plug-in screw terminals numbered 1-32.
System Description, AutroSafe Integrated Fire & Gas Detection System, 116-P-ASAFE-IFG/XE Rev. B, 2005-10-27,
Autronica Fire and Security AS
Page 14
Terminal Function
1 AutroFieldBus A
2 AutroFieldBus A’
3 AutroFieldBus CT A
4 AutroFieldBus Earth Fault Sense
9 AutroFieldBus B
10 AutroFieldBus B’
11 AutroFieldBus CT B
12 AutroFieldBus Earth Fault Sense
25 TX RS232 Port 0
26 RX RS232 Port 0
27 Signal Reference Port 0
28 Instrument Earth Port 0
29 +24V Input
30 0V Input
31 Instrument Earth Common
32 Protective Earth Common
All connections not listed in table above must be left unconnected.
4.2.4 Earthing and shielding of EAU-341 and AutroFieldBus
See also “System Shielding and Earthing” chapter 5.6.
29
30
31
32
EAU-341
+24V
0V
DC power supply
+24 in
0V in
IE
PE
EAU-341 power,
Single earth system
29
30
31
32
EAU-341
+24V
0V
DC power supply
+24 in
0V in
IE
PE
EAU-341 power,
Dual earth system
System IE
System PE