SensAlarm
Flex
–
Universal Gas Detection System
Sensidyne Document No. 360-0257-01 (Rev A)
P a g e
13 | 82
1.3.6. Additional Relay Outputs
An additional Four (4) Single Pole, Double Throw (SPDT) 5A relays can be added to SensAlarm Flex.
They are identical in operation to the standard relays in that the PCA includes LED lights for indication of
individual relay activations, but relays can be configured to function independently.
1.4. SensAlarm Flex Components
1.4.1. Sensor Interface Assembly
The sensor interface assembly is intrinsically safe, and contains the
electronics that operate and house Plus Series Sensors and the
optional Test-on-
Demand™ cell.
1.4.2. Plus Series Sensor
Plus Series Sensors are available in a variety of sensor technologies for
detecting Toxic, Oxygen, and Combustible gases. The Plus Series Sensor
is discussed in greater detail in Section 1.4.16. The sensor gasket seals
the sensor inside the sensor holder.
1.4.3. Test-on-Demand
The optional Test-on-
Demand™ (ToD™) gas generating cell provides
a method for periodic sensor response verification (programmed or manually
activated). The T-O-D gasket seals the generating cell inside the sensor holder.
1.4.4. Sensor Holder
The sensor and ToD™ gas generating cell are housed in the Sensor Holder.
The sensor holder is easily installed and removed via the retaining ring located
on the sensor interface assembly. The sensor holder is black anodized Aluminum,
optional gray PVC, or 316 Stainless-Steel.
1.4.5. Rainshield & Moisture Barrier
The optional Rainshield protects the sensor and ToD cell from liquid intrusion
due to rain, splash-back, or unintentional washdown, and offers an optional
highly recommended calibration port. The Moisture Barrier is an optional
component for a higher level of moisture protection. Target gases penetrate
the Moisture Barrier, where moisture does not. The Moisture Barrier is required
for use with IR sensor methods.
1.4.6. Calibration Plug
The Calibration Plug secures through a friction fit into the sensor shield at the
bottom of the sensor holder, which ensure a leak-tight introduction of calibration
gas standards. If not using the Rainshield with calibration port, the Calibration Plug
is a required accessory.
Summary of Contents for SENSALARM FLEX
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