E3M171 Line module ”Interactive” Ex Detectors
90
Building Technologies
001260_k_en_--.doc
Fire Safety & Security Products
02.2005
21
E3M171 Line module ”Interactive” Ex Detectors
21.1 Overview
z
Line module for
interactive Ex detectors
(and standard detectors)
z
I-Bus module with line processor and independent emergency operation proces-
sor
z
Designed for
1 stub line
z
Line inputs protected against over voltage
z
The ground fault monitoring is disabled, because Ex barrier must be grounded
on the plus conductor
z
Line is galvanically isolated from the control unit
z
Card format 100 mm x 200 mm
z
I-Bus address is set at programming switch ”S3”
21.2 Key
data
Addresses
...32 (normal and/or Ex detectors) 1)
Number of wires
2
Twisted cable
necessary
Line resistance (total)
...70
Ω
1) 2) 3)
Line capacitance (from SB3 on) ...70 nF 1) 2) 3)
T-branch yes
Quiescent current at 24 V
70 mA with 32 detectors
(50 mA without de 0.5 mA per D-Bus element with IMK=1)
1) Limitations –> see document 001508
2) With MICC max. 1000 m from the control unit to the last detector, with RADOX
max. 2000 m
3) –> see document 1204
Terminal block X20 (20 terminals)
–
mounted on module chassis
–
for the connection of the prefabricated cable to connection level, or
–
for direct connection of the periphery
Card chassis
–
mounted on module chassis
21.3 Special
functions
Emergency operation
–
Alarm evaluation upon ”Emergency operation” via
Emergency operation proc-
essor
and ”Emergency operation” in the detector
–
Upon emergency alarm, control console B3Q... gives a ”combined alarm”
with
flashing response indicator at the detector
–
Upon line short circuit
and
failure of the line processor there is
no
”Emergency
alarm”
–
Mimic display output (connectors ST10) only active with emergency alarm
