SDM-SW8A 8-Channel Switch Closure Input Module

Name: SDM-SW8A - 8-Channel Switch Closure Input Module
Brand: Campbell Scientific

デジタル入力周辺機器 / SDM-SW8A

RETIRED ›
This product is no longer available and has been replaced by: SDM-IO16A.

SDM-SW8A 8-Channel Switch Closure Input Module

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類似製品
詳細
仕様
互換性
ドキュメント
ケーススタディ
関連

概要

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.

利点と特徴

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

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詳細

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.

仕様

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 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)

互換性

注意： 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。

Data Loggers

製品	互換性	注意
21X (リタイア)
CR10 (リタイア)
CR1000 (リタイア)
CR1000X (リタイア)
CR10X (リタイア)
CR200X (リタイア)
CR206X (リタイア)
CR211X (リタイア)
CR216X (リタイア)
CR23X (リタイア)
CR295X (リタイア)
CR300 (リタイア)
CR3000 (リタイア)		For the CR3000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3.
CR310
CR500 (リタイア)
CR5000 (リタイア)		For the CR5000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3.
CR510 (リタイア)
CR6
CR800 (リタイア)
CR850 (リタイア)
CR9000 (リタイア)
CR9000X (リタイア)

Mounting Equipment

製品	互換性	注意
ENC10/12
ENC10/12R
ENC12/14
ENC14/16
ENC16/18
ENC24/30
ENC24/30S

Distributed Data Acquisition

製品	互換性	注意
Granite 10
Granite 6
Granite 9

互換性に関する追加情報

Data Logger Considerations

Programming

In the CRBasic data loggers, the SDM-SW8A operation is controlled by the SDMSW8A instruction. Instruction 102 controls the SDM-SW8A operation for Edlog data loggers that were shipped after October 1988 (consult Campbell Scientific for equipment shipped prior to this date).

Power Supply

Due to the 3 mA continuous and 6 mA active current drain, an auxiliary 12 Vdc power supply is recommended for powering the SDM-SW8A in remote, long-term applications.

For some applications, it may be convenient to use the data logger power supply. You can do this where ac power is available, or where a solar panel can be used for recharging the data logger's sealed rechargeable battery.

Enclosure Considerations

The SDM-SW8A requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. Grommets and screws are provided to attach the SDM-SW8A to the backplate of our enclosures.