CIE-A-200 Control Panel Engineering and Commissioning Manual
13
Loop Loading
In order to allow a method of calculating the maximum loop loading that the system will support, each device
has a rating assigned in Device Loading Units (DLUs). This relates to the load presented in alarm. A maximum
of 450 DLUs are permissible on each loop (subject also to a maximum of 200 addressable devices, whichever
limit is reached first).
The DLUs of the current models of devices as at October 2018 are as follows:
PRODUCT DESCRIPTION
DLU RATING
Type
Product
Code
Subtype
SP0
-
Off
Low
Medium
High
MP
203 0003
Multipoint Mk3
1
-
-
-
205 0003
ASD Mk3
1
-
-
-
MPS
203 0001
Multipoint with Sounder Mk3
1
1.5
4.5
6
205 0001
ASD with Sounder Mk3
1
1.5
4.5
6
205 0012
ASD with Sounder/Strobe Mk3
4.5
5
8
10
MCP
403 0006
403 0007
Manual Call Point Mk3
3
-
-
-
SOUNDER
313 0001
313 0002
Soundpoint Mk3
1.5
2
4
5.5
323 0001
Hipoint Mk3
1.5
2
4
5.5
303 0012
303 0022
Flashpoint
1.5
4.5
6.5
8
326 0021
326 0023
Sounder/Strobe
9
9.5
11.5
13
326 0001
326 0003
Sounder
1.5
2
4
5.5
326 0015
Strobe
9
-
-
-
I/O
803 0006
Loop I/O Module Mk2
10.5
-
-
-
CZM
803 0010
Conventional Zone Module
(Loop Powered)
23.5
-
-
-
803 0010
Conventional Zone Module
(Ext PSU)
3.5
-
-
-
ANCILLARY
803 0003
803 0005
Multipoint I/O Module (in Relay
Base)
Multipoint I/O Module (in Box)
3
-
-
-
600 0092
Remote Indicator
0.5
-
-
-
The CIE-A-200 OSP programming software v1.00 automatically keeps control of the quantities and DLU
ratings of devices on the loop and will warn the engineer if the limit is reached. It will not allow a system to be
programmed to exceed the maximum DLU rating.
It can detect the type of the device and, in the case of devices manufactured from March 2010, the subtype
from the above list as well. For devices manufactured prior to this date, the CIE-A-200 OSP will attempt to
detect the subtype and use the appropriate DLUs. The engineer can override the automatically detected
subtype if required i.e. if the OSP cannot correctly identify an older device, the engineer can tell the system
that the device is a different subtype to the one OSP has selected (e.g. a Soundpoint instead of Flashpoint)
within the same main type. The OSP can also work out the standby battery calculations.
Note: An Excel spreadsheet (document no. 26-1765) is also available to automatically work out both
standby battery calculations and loop loading calculations based on the quantities entered. This
includes ratings for legacy devices as the above current models.
