Detcon SmartWireless CX - Manual (Page 10)

Sentinel CX
Sentinel CX Sensor Station IM Rev. 1.4 Page 6 of 26
Cable to Sensor 1
(White) 4-20mA
(Red)
PWR
(Black) GND
(Green) Shld
Sensor
1
4-20mA (White) 2
GND (Black) 1
PWR (Red) 3
Sensor Connector
Shld (Green) 4
1
PCB
Enclosure
1
2 3
4
Figure 4 Sensor Input Connector Pin-out
1.7 Alarm Outputs
The SmartWireless® CX can optionally include an internal Relay PCA for activating alarm annunciators.
The Relay PCA includes four Class I Division 2 Groups A,B,C,D relays. If the SmartWireless® CX
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® CX in the system.
Internal Alarm
Connections Modbus ™
Connections
Alarm Relay Connections
Modbus ™
LSD Address
Figure 5 Relay PCA
If the SmartWireless® CX 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 11V Battery Power to external annunciators when an alarm is initiated. The ‘Wet’ relay contacts
are rated for 9-11.1 VDC, 2A max total (A1, A2, A3, and FLT outputs combined). 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.