Campbell Scientific SDM-CD16S 16-Channel Solid State DC Relay Controller Module - Manual (Page 6)

SDM-CD16S 16 Channel Solid State DC Control Module
Edlog dataloggers that support SDM-CD16 devices, I/O Instruction 104 is
used (some old CR7s may use Instruction 29).
In addition to SDM control, the SDM-CD16S has individual digital control
inputs for each of the outputs. A logic high (5 V) on the control input will set
the associated output high. The control input OR the SDM command can set
the output high. Both the SDM command and the control input must be low
for the port to be low. The logic control inputs may be useful for using one of
the datalogger’s control ports with the pulse width modulation instruction for a
proportional control that changes faster than the datalogger scan rate. (The
pulse width modulation instruction is PWM in CRBasic dataloggers,
Instruction 137 in the CR23X.) Devices other than the datalogger that have a
0V/5V logic output for control might also be used to activate the digital control
inputs.
Ensure that the datalogger contains the appropriate instruction
and test your datalogger program before going in the field. NOTE
2. Specifications
Compatible dataloggers: CR9000(X), CR5000, CR3000,
CR1000, CR850, CR800, CR23X,
CR10, 21X, and CR7.
Logic power voltage: 7 to 48 VDC
Logic current drain at 12 VDC: 15 mA quiescent;
2.5 mA per active LED (manual or
auto)
Maximum cable length: 20 ft total to all SDM devices.
Consult CSI if longer lengths are
necessary.
Toggle switch: MANUAL, OFF, AUTO
Individual dip switches for manual
Supply voltage for output: 48 Volt Max, DC only
Maximum current per channel: 2 Amps
Maximum current all channels total: 10 Amps Fused
Fuse: 3 AG – 10 A
Actuation/release times: 8 μs/200 μs
Operating temperature: -40 ° to 70°C
* If more detailed output characteristics are required, experienced users should
consult the equivalent circuit diagrams shown in Figure 2, below.
2