38 Johnson Controls, Inc. SLC Wiring Manual — P/N 51870:G 04/23/2009
Monitor Modules NFPA Style B IDC Using Dual Monitor Modules
6.5 NFPA Style B IDC Using Dual Monitor Modules
Connect the SLC wiring to the M300DJ module terminals 1 (–) and 2 (+).
Use the rotary switches on the module to set it to the required SLC address. Each dual module takes
two addresses on the SLC. Circuit ‘L’ corresponds to the address set on rotary switches. Circuit ‘H’
will automatically respond at the next higher address. The Circuit L “base address” is always an
even number; the lowest possible address is 02. The Circuit H “base + 1” address is always odd.
Use caution to avoid duplicate addressing of modules on the system.
Each IDC (H & L) is power limited to 230 microamps @ 24 VDC.
Figure 6.9 shows typical wiring for a supervised and power-limited NFPA Style B (Class B)
Initiating Device Circuit using the M300DJ dual monitor.
Module installation notes:
1. The Initiating Device Circuit (IDC) is supervised and current-limited to 210 microamps
@ 24 VDC (nominal).
2. The IDC provides the following services (do not mix):
• Fire alarm service
• Automatic and manual waterflow alarm service with normally open contact devices
• Sprinkler supervisory service with normally open contact devices
• Security service
3. Refer to the Device Compatibility Document for compatible smoke detectors.
Figure 6.9 Typical Style B IDC Wiring with M300DJ
SLC-idcB3fdm1.wmf
Heat
Detector
Manual
Pull
Station
SLC
M300DJ
Base +1 Address
(IDC Circuit H)
Base Address
(IDC Circuit L)
47K
ELR
47K
ELR
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