SDM-IO16 Datalogger

The SDM-IO16 expands the digital input andor output capability of Campbell Scientific dataloggers. It offers similar functionality to the control ports of our CR10X and CR23X dataloggers. When configured as an input, each port can monitor logic state, count pulses, measure signal frequency, and determine duty cycle. The SDM-IO16 can also be programmed to send an interrupt signal to the datalogger when one or more input signals change state.
Features
Provides 16 digital IO ports
Input configuration options: Monitor logic state, count pulses, measure signal frequency, and determine duty cycle
Output configuration options: Port set to 0 or 5 V by datalogger or source current up to 100 mA
When driving loads, external power supply recommended
Requires Datalogger Instruction 188
Complies with EN61326:1997
Specifications
SDM and IO Port: 05 V logic level ports for connecting to the datalogger’s controlSDM ports
EMC Status: Complies with EN 61326:1997
Operating Voltage: 12 Vdc (nominal 9 to 18 V)
Current Drain
Typical Standby: 600 µA (all ports high, no load, excludes pulse counting)
Maximum: 3 µA (active will all 16 port counting pulses at 2 kHz and no output load)
Output Voltage (no load)
ONHI: nominal 5 V, minimum 4.5 V
OFFLO: nominal 0 V, maximum 0.1 V
Output Source Current: 42 mA @ 3 V; 133 mA short-circuited to ground
Input Voltage:
High: 4.0 V minimum threshold
Low: 1.0 V maximum threshold