De Nora Capital Controls CHLORALERT 17CA3000 Series - Sensor;Transmitter Electrical Connections; Table 2-1 Sensor Wiring and Configuration

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Although the above table shows recommended wiring, a sensor may be wired to any CHANNEL as long as
the configured CHANNEL corresponds to the terminals to which the sensor is wired. For example, a single
sensor may be wired to the S3+ AND S3- terminals as long as the CHANNEL 3 is configured for that sensor
in the configuration menu. Wiring a sensor to S2+ and S2- terminals and configuring CHANNEL 1 will cause
a sensor alarm to be generated.
CAUTION
After making sensor/transmitter electrical connections, care must be
taken to replace the sensor/transmitter wiring box cover properly. The wiring
box is not perfectly square (refer to Figure 2-2) and the cover must be aligned
properly to the box for the gasket to seal the box properly.
2.4 Sensor/Transmitter Electrical Connections
WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line
voltage presents a potential electrical shock hazard to the user.
Make certain that the system input and digital output relay connections
are disconnected from the operating branch circuit branch circuit before
attempting to connect sensors to the receiver.
Precautions must be taken to insure that the sensor/transmitter assembly is correctly wired to the receiver. The
sensor/transmitter assembly interfaces with the receiver circuitry via the sensor interface, terminal block TB3.
This terminal block consists of 12-positions organized into 3 terminals for each of the four possible sensors.
Each sensor is wired to a S+, S- and SHD (shield) terminal.
Sensor wiring for the Chlorine Electrochemical Sensor is shown in Figure 2-4. The example shown in the figure
shows a single sensor wired to terminals S1+ and S1- on TB3. These terminals correspond to CHANNEL 1 in the
SETUP-CONFIGURATION-CHANNELS menu selection discussed in chapter 4.0, START-UP AND OPERATION.
For a single-sensor system, it is recommended that the sensor be connected to the S1+ and S1- terminals and
that it be configured as CHANNEL 1 in the firmware. The sensor wires are polarized and the RED wire must
be connected to the “+” terminal while the BLACK wire connects to the “-“ terminal. As mentioned previously,
the figure shows wiring for a single-sensor system. If additional sensors are being used, the suggested wiring
configuration is shown in Table 2-1 below.
Table 2-1 Sensor Wiring and Configuration
Number of Sensors Sensor Terminals
Channel
1 1 S1+, S1 1
2 1
2
S1+, S1-
S2+, S2-
1
2
3 1
2
3
S1+, S1-
S2+, S2-
S3+, S3-
1
2
3
4 1
2
3
4
S1+, S1-
S2+, S2-
S3+, S3-
S4+, S4-
1
2
3
4
WARNING
Calibrated Sensors are calibrated to a specific channel on the
gas detector and are required to be wired as such