Nac Wiring; Overview; Terminal Connections - Simplex 4010 Installing And Operating Insructions

NAC Wiring

Overview

Terminal Connections

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The 4010 provides four NACs for notification appliances such as horns and
strobes. These NACs are standard Class B (Style Y). Optional Class A (Style
Z) operation can be achieved using an adapter. Refer to the 4010-9806 Class A
Module - Installation Instructions, Part No. 574-055 for information on the Class
A NAC adapter.
The NACs supervise for short or open circuit troubles. In the event of a short,
the NAC does not energize. Each NAC is rated at 2A. Up to 4A of NAC power
is available from the base unit. If more power is needed, NAC 3 and NAC 4 can
be connected to an expansion power supply.
An auxiliary (AUX) power connection (rated at 1/2A, 24VDC) is provided at
TB5 located to the left of the auxiliary (AUX) relay terminal blocks at the
bottom center of the SFI/O. Current drawn from TB5 must be deducted from the
4A total NAC power.
Each NAC can be configured as "On until Silence" or "On until Reset" and can
be coded or non-coded (refer to "Chapter 6 - Configuring Points" for more
information). The 4010 can disconnect each NAC individually to aid in locating
earth faults.
The NAC's wiring connects to TB1 and TB2 as shown in Figure 3-3. These
terminal blocks are barrier strip type that can accommodate 12-18 AWG wires.
TB1 and TB2 are located in the upper left corner of the SFI/O. Refer to the 842-
058 wiring diagram for Alarm Current, Wiring Distance, and Line Resistance
values.
TB1-1: NAC 1 + Alarm
TB1-2: NAC 1 - Alarm
TB1-3: NAC 2 + Alarm
TB1-4: NAC 2 - Alarm
NAC 1
Alm+ Alm- Alm+
TB1
1 2
Figure 3-3. NAC Wiring
3-4
TB2-1: NAC 3 + Alarm
TB2-2: NAC 3 - Alarm
TB2-3: NAC 4 + Alarm
TB2-4: NAC 4 - Alarm
NAC 2 NAC 3
Alm- Alm+
3 4
1
NAC 4
Alm- Alm+ Alm-
TB2
2 3 4