Shield Shiel A-XT - Initiating Device Circuit (IDC) Ratings; Notification Appliance Circuit (NAC)

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Specifications A

Shield Fire, Safety and Security Ltd.

Shield A-XT Releasing Fire Control Panel - Installation and Operation Manual SEXTCP-OM

Revision E01.00

71 of 127

Field Terminal Capacity

Field terminal capacity: 14 to 22 AWG solid or stranded wire

Initiating Device Circuit (IDC) Ratings

The maximum line impedance shown in the table above represents all initiating circuit types on detection zones of the

Shield A-XT Releasing Fire Control Panel.

Notification Appliance Circuit (NAC)

Parameter Rating

Maximum Operating Voltage 21.6 VDC

Maximum Short Circuit Current 65 mA

Maximum Line Impedance 20.3 Ohms

Maximum Number of Detectors on Zones

1, 2 and 3

Reference Appendix B, Equipment List, Detectors

Detector Compatibility Identifier on Zones

1, 2 and 3

Reference Appendix B, Equipment List, Detectors

Detector Installation Limits on Zones 1, 2

and 3

Reference Appendix B, Equipment List, Detectors

Connection Rating

NAC 1 ( + )

NAC 1 ( - )

Special Application: 18 to 28 VDC @ 500 mA continuous

Regulated: 18 to 28 VDC @ 50 mA continuous

Fused: Electronic 1.1 A

Supervision: Voltage reversing DC

Short Circuit Threshold: 130 Ohms +/- 20%

Maximum line-voltage-drop: 2 VDC

NAC 2 ( + )

NAC 2 ( - )

Special Application: 18 to 28 VDC @ 500 mA continuous

Regulated: 18 to 28 VDC @ 50 mA continuous

Fused: Electronic 1.1 A

Supervision: Voltage reversing DC

Short Circuit Threshold: 130 Ohms +/- 20%

Maximum line-voltage-drop: 2 VDC