Campbell Manufacturing SDM-SW8A 2. Specifications

SDM-SW8A Switch Closure Input Module

2. Specifications

Operating voltage:			12 VDC nominal (9.6 to 16)
Current drain:			3 mA quiescent, 6 mA active (max)
Environmental:			-25 to +50oC, 0 to 90% RH,
			noncondensing
Measurement types:			Switch closure (SPDT, SPST) DC voltage
			pulse
Input voltage threshold:			From below 0.9 to above 4.0 VDC,±20
			VDC max
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
Max count/port:			65535
Internal sampling frequency:			500 Hz
Watchdog reset:			Yes
Total length of connecting cables: 20 feet
Dimensions:			0.9"(H), 6.2"(L), 2.7"(W)
Weight			0.5 lbs. (0.23 kg)
Compatible dataloggers:			CR10(X), CR800, CR850, CR1000, 21X,
			CR23X, CR3000, CR5000, and CR7
	TABLE 1. Datalogger to SDM-SW8A Connections
			Datalogger
			CR1000,
			CR800,
			CR850,
SDM-SW8A		CR7	CR23X,	CR3000,
			CR10(X)	CR5000	21X
+12		+12	12 V	12 V	+12
(see Note 1)
			G	G
C3		C3	C3	SDM-C3	C3
C2		C2	C2	SDM-C2	C2
C1 IN		C1	C1	SDM-C1	C1
C1 OUT		not used	not used	not used	1H
		(see Note 2)	(see Note 2)	(see Note 2)	(see Note 2)

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