Zeta Alarm Systems.
Classic 2000 Mk II Operation Manual
Revision 1.0
Part # MAN-Z3K-01
Page 32
2.5.5 Sounder Control Module
Figure W-8
Notes for Class A & Class B Wiring
1.
Polarity shown when sounders are DE-ACTIVATED, supply is reversed when sounders are
ACTIVATED.
2.
Power supply connected to the SCM should be from the Classic 2000 Mk II, ZIPB-3, or indepen-
dent, 24V DC, listed for fire protection, with battery backup and power limited per NFPA 72.
3.
To replace sounders with ‘P.A.’ speakers, move Jumper (J1) to disable the module external
supply monitoring.
4.
When operated in ‘P.A.’ mode, an Audio Amplifier of 70.7 Vrms MAX should replace external
supply, with wire supervision capability as per NFPA.
5.
All wiring must conform to applicable local codes, ordinances and regulations. e.g. NFPA 72
6.
Use Listed 47-K, 0.5-W EOL resistor (PN 902A) for Class B.
7.
Select Class A or B mode using Bit 8 of DIL switch
8.
Relay Rating, 2A @ 24Vdc 0.35pf, 500mA @ 120Vac 0.35pf in fire protection applications.
9.
Refer to Appendix J or the device’s installation instructions for addressing information.
10. All circuits are supervised and power limited.
