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CZM-1B6 Connections and Ratings
NOTES
1. Intrinsically Safe Output:
Open Circuit Voltage: 28 VDC
Short Circuit Current: 93mA
2. Maximum loop resistance must not exceed 35 ohms.
3. A maximum of ten DI-3IS Ionization Detectors or up to
five S121 or S122 Flame Detectors can be used in addition
to mechanical (non-energy storing) shorting devices.
4. Maximum safe system voltage is 250 VAC.
5. For mounting and installation of the ISI-1, see the ISI-1
instructions.
6. Only mechanical (non-energy storing) shorting devices
such as the MS-51 Manual Station may be used.
Intrinsically Safe Zone Wiring
FM Approved Only (Not UL Approved)
7. WARNING: Do not make any connection to terminal 6
of the DB-3S base. Such a connection would void use
in an intrinsically safe application.
8. In addition, S121 and S122 are also approved for use in
Class II and Class III, Groups E, F, and G.
9. For guidance on installation see ANSI/ISA RP 12.6,
Installation of Intrinsically Safe Instrument Systems in
Class I Hazardous Locations.
10. For DI-3IS information, see the DI-3 Series installation
instructions, P/N 315-081943.
11. For S121 and S122 information, see the installation
instructions, P/N 315-085258.
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