
Document: LT0273
MX4428 MXP Engineering / Technical Manual
Device Information and Programming
Issue 1.5
24 March 2006
Page 3-7
3.2
DEVICE HANDLING CAPABILITY
3.2.1 OVERVIEW
The parameters which determine the maximum number of each device type that can be put
on a loop are as follows. The column “MAX NO. DEVICES” assumes that all devices are of
the same type. If this is not the case, it is necessary to perform the calculations described
below.
DEVICE MAX
NO.
DEVICES
Quiescent
Current
Alarm
Current
AC Units
(max 250
total)
IB Units
(max 100 IB
units between
Isolator Bases)
814I 200
330uA
3.0mA
1
1.4
814H 200
250uA
3.0mA
1
1
814PH 200
275uA
3.0mA
1
1.2
814P 200
275uA
3.0mA
1
1.2
814CH 200
275uA
3.0mA
1
1
MIM800
200
275uA
2.8mA (with LED)
275uA (no LED)
1 1.5
MIM801
200
275uA
2.8mA (with LED)
275uA (no LED)
1 1.5
CIM800 200
275uA
2.8mA
1
1
DIM800 200
100uA
(Loop)
100uA (Loop)
1
1
CP820 200
275uA
2.8mA
1
1.5
RIM800
200
285uA
2.8mA (with LED)
285uA (no LED)
1 5
SNM800
200
450uA
3.0mA (with LED)
450uA (no LED)
1 5
LPS800
33 or less,
depends on
load
450uA Load
current
+
4mA, with
minimum of 12mA
1.5 1
5BI N/A
80uA
0.2 N/A
814SB 40(Quiet)
30(Medium)
24(Loud)
400uA 9mA(Quiet)
12mA(Medium)
15mA(Loud)
2.4 2.5
802SB* 200(Quiet)
50 (Loud)
200uA 1.2mA
(Quiet)
6.8mA (Loud)
0.5 2.5
812SB* 18
200uA
21mA
0.5
2.5
901SB* 200
200uA
200uA
(Loop) 0.5
2.5
912SB* 200
200uA
200uA(
Loop) 0.5
2.5
814RB 200
50uA
100uA
0.3
1.6
VLC800
125
300uA
300uA (no LED)
2.8mA (with LED)
2 1
*Models of MkII Sounder Base
Table 3-2 Device Quantities and Loading
The particular combination of device types, external loads, cable length and type may limit
the total number of devices. This is calculated in the following sections.
There are two types of load which must be considered - DC and AC. Also if isolator bases
are used, the loading between each isolator base must be considered.