SDM-SW8A
SDM-SW8A
RetiredConfigurable8-Channel Switch Closure Input Module
Pricing
- Model:
- SDM-SW8A
- Item Number:
- 4592
- Warranty:
- 1 year
- Lead time:
- 14 days
Overview
Your data logger can measure more switch closures or voltage pulses with an SDM-SW8A. Sensors that output a switch closure or voltage pulse signal include tipping bucket rain gages, flow meters, and anemometers.
Key Advantages
For switch closure or voltage pulse sensors
Technical Description
The SDM-SW8A provides eight channels for connecting the sensors. Each channel is individually configured for single-pole double-throw (SPDT), single-pole single-throw (SPST), or voltage pulse measurements. Output options include counts, duty cycle, and state.
SDM Operation
The data logger enables individual modules through an addressing scheme; multiple SDMs (in any combination) can be connected to one data logger. We recommend a maximum of four SDM-SW8As be connected to a single data logger. After a module is enabled, it operates independently of the data logger until additional commands are received or results are transmitted.
Benefits
- Well suited for use in energy management studies
- Provides eight individually configured channels
- Measures a variety of signals: reed switches, dry contacts, or slow voltage pulses
- Allows up to four SDM-SW8As to be connected to a single data logger
Specifications
- Function
- Increases the number of switch closures or voltage pulses a data logger can measure.
- Number of Channels
- 8
- Measurement Types
- Switch closure (SPDT, SPST), dc voltage pulse
- Input Voltage Threshold
- From below 0.9 to above 4.0 Vdc
(±20 Vdc maximum)
- Maximum Input Frequency
- 100 Hz
(50% duty cycle)
- Minimum Input Pulse Width
- 5 ms high, 5 ms low
- Maximum Bounce Time
- 3 ms open without counting
- Output Options
- State, duty cycle, counts
- Maximum Count/Port
- 65535
- Internal Sampling Frequency
- 500 Hz
- Watchdog Reset
- Yes
- Operating Temperature
- -25° to +55°C
- Operating Voltage
- 9.6 to 16 V
- Typical Current Drain
- 3 mA quiescent
- Typical Current Drain
- 6 mA active
(maximum)
- Relative Humidity
- 0 to 90% RH
(non-condensing)
- Maximum Cable Length
- 6 m (20 ft) total to all SDM devices
Consult Campbell Scientific if longer lengths are necessary. - Dimensions
- 15.7 x 6.9 x 2.3 cm
(6.2 x 2.7 x 0.9 in.)
- Weight
- 0.23 kg
(0.5 lb)
