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Sentinel CX

Sentinel CX Sensor Station IM Rev. 1.2 Page 6 of 6

1.7 Alarm Outputs

The SmartWireless® CXT can optionally include an internal Relay PCA for activating alarm annunciators.

The Relay PCA includes four Class I Division II relays rated for 10A @ 30VDC/250VAC. If the

SmartWireless® CXT includes an attached strobe and/or horn, these devices are also activated by the Relay

PCA.

Each Relay PCA must have a unique Modbus address. The Relay PCA includes a single rotary switch to set

its Modbus address (Figure 5). The most significant digit of the address is hard-wired to “8”. The least

significant digit (LSD) is controlled by the rotary switch. The Relay PCA addresses should start at 80h and

continue sequentially for each SmartWireless® CXT in the system.

Internal Alarm

Connections

Modbus™

Connections

Alarm Relay Connections

Modbus™

LSD Address

Figure 5 Relay PCA

If the Smart Wireless® CXT is ordered with the Relay PCA option, the Relay PCA can be configured to

provide either ‘Wet’ or ‘Dry’ contacts for external annunciator activation. The ‘Wet’ contact option

provides 12V Battery Power to external annunciators when an alarm is initiated. The ‘Wet’ contacts are

available on a 5 pin Alarm Connector (Figure 6). These outputs are specifically meant for external 12V

annunciators such as the external A1 C1D2 Horn, which is designed to operate on the unit’s 12V Battery.

12V Battery Power

12V Return

Relay PCA

COM

FAULT

COM

ALARM 3

COM

ALARM 2

COM

ALARM 1

Enclosure

ALARM 2 (Gray) 3

Alarm Connector

ALARM 3 (Brown) 4

FAULT (BLUE) 5

ALARM 1 (White) 2

GND (Black) 1

Figure 6 External Alarm Connector pin out for ‘Wet’ alarm contacts

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Detcon 240 Manual de instrucciones Pagina 10