4–20Ma Connections; Default 4-20Ma Settings - Dräger Flame 5000 Technical Manual

4–20mA Connections
The following table provides a function summary of each terminal if the detector is ordered in 4-20mA mode.
Terminal Terminal No.
+24v 1
0v 2
A 3
B 4
VID+ 5
VID- 6
485A 7
+24v 8
0v 9
C 10
D 11
ALRM 12
ALRM 13
485B 14
If the detector is connected in the above manner if a fi re alarm is signalled then the 4-20mA outputs generate 18mA
if a fault develops the 4-20mA signal indicates 0 or 2 mA dependant on the fault see table for default current levels. If
terminals 3 & 4 are disconnected from their connections these wires then provide a RS485 connection to the detector.
This connection may then be used to up load or down load information to the detector.

Default 4-20mA settings

Event Output
Catastrophic Failure
Optical Fault
Healthy condition
Alarm
Over range
There is a tolerance on the mA outputs of ±5%, other values maybe selected at the point of order.
Description
+24V Supply A
0V Supply A
Tie to +24 Volts at panel
4-20 mA source
Video +Ve
Video –Ve
RS485 termination +Ve
+24V Supply B optional
0V Supply B optional
Not used
Do not connect
Do not connect
Not used
RS485 termination -Ve
0mA
2mA
4mA
18mA
21mA
Installation of the Dräger Flame Detector 5000
1 7
8 14
6
5
4
2
1
VIDEO -VE
VIDEO +VE
4-20mA Source
0 VDC
+24 VDC
15