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12-Bit 4-20 mA Input Adapter (Part # S-CIA-CM14)
The 12-Bit 4-20 mA Input Adapter is used for sensors with
4-20 mA current loop outputs and is designed to work with the
®
HOBO
Weather Station and Micro Station data loggers. The
input adapter features both a battery-saving switched input and a
non-switched input. It also provides a trigger source voltage for
controlling power to external sensors. The input adapter has a
plug-in modular connector that allows it to be added easily to the
HOBO Weather Station or HOBO Micro Station.
Specification
Measurement Range*
Accuracy
Resolution
Input Impedance
Switched Input
Sensor Trigger: Source
Operating Temperature
Range
Housing
User Connection
Dimensions
Weight
Number of Data Channels
Measurement Averaging
Option
Digital Filtering
Bits per Sample
Length of Network Cable
Part Number
* The input adapter can provide readings as low as 0 mA. This can be helpful when diagnosing sensor issues such
as open inputs.
†
The HOBO Weather Station and HOBO Micro Station have 10 and 4 data ports, respectively. A single HOBO
Weather Station or HOBO Micro Station can theoretically accommodate up to 15 data channels and up to 100 m
(328 ft) of network cable (the digital communications portion of the input adapter and smart sensor cables),
although available space in the enclosure may limit the number of sensors you can attach.
© 2003 Onset Computer Corporation
Part #: MAN-S-CIA
Doc #: 7583-A
12-Bit 4-20 mA Input Adapter
4-20 mA
± 0.1 mA (± 0.5% full scale) over full temperature range of -40°C to 75°C
(-40°F to 167°F)
± 4.93 µA
124Ω
Maximum switch voltage above ground (Pin 2 to Pin 1): 20 V
Maximum switch current: 50 mA
On time: 316.6 ms ± 3%
Voltage: 2.5 V ± 2.4%; maximum source current: 1 mA
On time: 316.6 ms ± 3%
-40° to 75°C (-40° to 167°F)
Plastic case; must be placed inside logger enclosure to protect from direct
exposure to the weather
Six-position screw terminal strip (16 – 30AWG); shielded cable recommended with
outside diameter of 3.2 mm to 3.8 mm (0.125 in. to 0.150 in.)
4.5 x 4.8 x 1.6 cm (1.8 x 1.9 x 0.6 in.)
25 g (0.88 oz)
†
1
Yes
Automatic digital filtering with 32 readings/sample in 16.6 ms
12
†
14 cm (5.5 in.)
S-CIA-CM14
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Table of Contents
Related Manuals for Onset S-CIA-CM14
Summary of Contents for Onset S-CIA-CM14
- Page 1 12-Bit 4-20 mA Input Adapter (Part # S-CIA-CM14) The 12-Bit 4-20 mA Input Adapter is used for sensors with 4-20 mA current loop outputs and is designed to work with the ® HOBO Weather Station and Micro Station data loggers. The input adapter features both a battery-saving switched input and a non-switched input.
-
Page 2: Inside This Package
12-Bit 4-20 mA Input Adapter Inside this package • 12-Bit 4-20 mA Input Adapter • Hook-and-loop tape • Three cable ties Mounting For the HOBO Weather Station, use the self-adhesive hook-and-loop tape included in the package to mount the input adapter on top of the battery cover inside the logger enclosure. To mount more than one adapter, use the back of the logger enclosure door. -
Page 3: Typical Setup
12-Bit 4-20 mA Input Adapter Sensor Input Connections 12-Bit 4-20 mA Input Adapter utilizes a 6-position screw-terminal block for sensor connections with wire sizes ranging from 16 to 30AWG. Pin numbers, names and descriptions are as follows. Pin # Pin Name Description GROUND Ground. -
Page 4: Operation
To use the 12-Bit 4-20 mA Input Adapter, stop the logger and insert the adapter’s modular jack into an available sensor connection port on the logger. If no port is available, use a 1-to-2 sensor connection adapter (Onset part # S-ADAPT), which allows you to plug two sensors into one port (HOBO Weather Station only). - Page 5 12-Bit 4-20 mA Input Adapter Using the Switched Input The 12-Bit 4-20 mA Input Adapter can be used with continuously powered 4-20 mA transducers as well as remote applications with external battery-powered 4-20 mA transducers. (See Figures 2 and 3.) To take advantage of the switched input, the 4-20 mA transducer must meet the following criteria: •...
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Page 6: Maintenance
This product is warranted to be free from defects in material and workmanship for a period of one year from the date of original purchase. During the warranty period, Onset will, at its option, either repair or replace products that prove to be defective. This warranty is void if the Onset products have been damaged by customer error or negligence, or if there has been an unauthorized modification.
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