Campbell Scientific SDM-SW8A 8 Channel Switch Input Module - TESTED W/ WARRANTY

Description

This Campbell Scientific SDM-SW8A, 8 CHANNEL SWITCH CLOSURE INPUT MODULE, like all the equipment we sell, has been comprehensively bench tested, updated with the latest firmware, new batteries and desiccant*. It comes with a warranty. Buy with confidence that what you receive will perform as expected.
Will ship within 8 hours of receipt of payment or the next business day.
Shipping service at discretion of seller
Details:
The SDM-SW8A provides eight channels for connecting 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.
Operation:
The data logger enables individual modules through an addressing scheme; multiple SDMs (in any combination) can be connected to one data logger. After a module is enabled, it operates independently of the data logger until additional commands are received or results are transmitted.
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
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)
Other Equipment:
Additionally, I have Campbell power supplies and other related equipment listed in separate auctions. I also have a wide variety of related items that have not been listed. If you need any other peripherals to complete your data collection system, please ask, I may be able to assist. You will receive a shipping discount when multiple items can be combined into one shipment.
Note: I have a few of these, all in good condition and all have undergone the same refurbishing process, for that reason the one you receive may differ slightly than the pictures.
*Possible updates depend on the particular piece of equipment.
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you post feedback. I will do everything I can to ensure the buyer is completely satisfied with their purchase. Do not assume what is included in the sale, if you have any doubts please ask
before
you place your bid. All sales are completed with the understanding that the buyer has independently determined the suitability of such products for its purposes prior to purchase. Picture may be of stock item and not necessarily the actual item for sale. There are no expressed or implied warranties being offered with these items unless otherwise specified. Shipping carrier may change from carrier listed unless specified by buyer at time of payment.