CTD-N Technical Manual
P/N 95F-6000-00 (February 2017)
page 91
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
APPENDIX C:
Optional Sensors
The Citadel CTD has two types of sensors: Internal Sensors and External Sensors. The Internal Sen-
sors are built into the system, and the External Sensors are optional ADC sensors attached to the
optional ADC End Cap.
The External Sensor channels are listed with the
ROP
CHID1=0
CHID2=0
CHID3=0
CHID4=0
CHID5=0
NOTE.
External Sensors 1-4 are A/D Channels and these channels are dedicated for
Analog External Sensors. Channel 5 is dedicated for Digital External Sensors.
The CTD-N with the optional ADC End Cap includes two 12-pin bulkhead connectors together with
the 6-pin bulkhead connector on the lower end cap as shown in Figure 49. These are the Option 1
and Option 2 connectors which are used to connect to optional external sensors. The Option 1 con-
nector is specifically provided for connecting to Seapoint turbidity and fluorometer sensors. It out-
puts power and gain control signals to the sensors and inputs the sensor signals. The Option 2 con-
nector provides power, two 0–5 VDC input channels and one RS-232 serial interface. The Option 1
connector is identified by its female locking collar; the Option 2 connector, by its male locking col-
lar.
NOTE.
The power available for the external sensors is 11 VDC nominal at 50 mA maximum
for any sensor; 150 mA maximum total is available for all the sensors.
The Option 1 and Option 2 connectors and their associated components are listed in Table 11. Fig-
ure 49 shows the pin orientation for the two connectors, and the connector wiring information is
shown in Table 12 for the Option 1 connector and Table 13 for the Option 2 connector.