3
Refer to Figure 3. All circuits are power limited to
NFPA 70 per NEC 760. Each detector or group
of detectors must use a 2-wire circuit of at least
18 AWG, thermoplastic fixture wire, enclosed in
conduit. If permitted by local building codes, 18
AWG limited energy, shielded cable without conduit
may also be used.
Total circuit resistance must not exceed 70
ohms—40 ohms if relay bases are used.
NOTES:
1. All circuits can be Class A or Class B.
2. All circuits are power limited per NEC 760.
3. All circuits are supervised.
4. Do not connect more than one PBA-1911 to each zone. (Refer to PBA-1191 Instructions,
P/N 315-095424, for further information.)
5. Do not mix smoke detectors with the PBA-1191.
6. Maximim resistance: 70 ohms/circuit.
7. The PBA-1191 requires Rev. 3 or higher of CZM-4 software.
8. Positive and negative ground fault detected at <20 ohms for terminals 1-16.
Figure 2
CZM-4 PC Board
Figure 3
Wiring Diagram
Refer to Wiring Specification for
MXL, MXL-IQ and MXLV
Systems, P/N 315-091772
revision 6 or higher, for
additional wiring information.