Installation Power-limited Wiring Requirements

24 MS-2/MS-4 PN 51512:E 01/18/05
2.5 Power-limited Wiring Requirements

Power-limited and nonpower-limited circuit wiring must remain separated in the

cabinet. All power-limited circuit wiring must remain at least 0.25” (6.35 mm) away

from any nonpower-limited circuit wiring. Furthermore, all power-limited and

nonpower-limited circuit wiring must enter and exit the cabinet through different

knockouts and/or conduits. A typical wiring diagram for the MS-4 is illustrated below.

ON
1 2 345678
ON
1 2 345678
ON
1 2 345678
SUPERVISORY
SUPERVISORY
SUPERVISORY
SUPERVISORY
TROUBLE
TROUBLE
TROUBLE
TROUBLE
MAINTENANCE
MAINTENANCE
MAINTENANCE
MAINTENANCE
FIRE ALARM
FIRE ALARM
AC
POWER
NAC
DISABLE
NAC
FAULT SYSTEM
TROUBLE
POWER
TROUBLE
WALK
TEST
ALARM
SILENCE
ZONE
DISABLE
FIRE ALARM
FIRE ALARM
RESETWALKTESTALARMSILENCEACK
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE
ENABLE/DISABLE
34
2
1
TB1TB2TB3TB5TB6TB7
+ - + -
Nonreset ResettableC NC NOALARM SUPVC NC NOJ8J7J9TB8JP1SW1BATTERYHOT NEUT EARTHTRANSFORMER 1TRANSFORMER 2SW2 SW3JP2
EARTHBATTC HG
4XLBTB1
A+ A- A+ A -
NAC 1 NAC 2
CLASS A CLASS A
A+ A- A+ A -
ZONE 1 ZONE 2
CLASS A CLASS A
A+ A- A+ A -
ZONE 3 ZONE 4
CLASS A CLASS A
SIGNAL TRANSFORMER
XX-XXX-XXXXXX Rev X
SIGNAL TRANSFORMER
XX-XXX-XXXXXX Rev X

Figure 2.9 Typical UL Power-limited Wiring Requirements

Power-limited Circuits Nonpower-limited Circuits

Power-limited

Circuits

Nonpower-limited

Circuit

AC Power

4XTMF

4XLMF

CAC-4

ms4ulpwr.cdr