The SDM-CVO4 is a synchronously addressed datalogger peripheral that outputs variable voltage or current signals under datalogger program control. Each output can be set to 0-10 Vdc or 0-20 mA by the datalogger program (current outputs can also be scaled and limited to 4-20 mA).
Typical applications include driving remote ‘current-loop’ display units, re-transmitting measured values to industrial control systems that have current or high voltage inputs, sending control signals to valve controllers and providing excitation voltages or currents to external sensors.
Features
Expands datalogger analog output capability
Provides four independent current or voltage outputs
Supports a voltage output range of 0 to 10000 mV with a resolution of 2.5 mV
Supports a current output range of 0 to 20000 µA with a resolution of 5 µA
Generates a 0-20 mA current source using its own power supply
Compatible with CR800, CR850, CR1000, CR3000, CR5000, CR7, CR10X, 21X, and CR23X dataloggers
Conforms to EN55022-1:1998 and EN50082-1:1998
Specifications
Operating voltage: 12 Vdc nominal (8 to 16 V)
Current drain @ 12 Vdc:
Typical active quiescent current: 27 or 54 mA, depending on operating mode (no load on output ports). To estimate the total current, add the quiescent current to the sum of all output currents multiplied by 1.5. For example, if each port is at 10 mA output, the total = 54 + (1.5•4•10) = 114 mA.
With all outputs off: <0.5 mA
Voltage Mode
Range: 0 to 10,000 mV
Resolution: 2.5 mV
Maximum output current: 30 mA per channel
Minimum load current: 5 µA if output <200 mV
Accuracy:
+23°C: ±0.02% of set voltage + (±2.5 mV)
-25° to +50°C: ±0.13% of set voltage + (±2.5 mV)
Current mode
Range: 0 to 20,000 µA
Resolution: 5 µA
Minimum output current (leakage): 5 µA at +50°C
Accuracy (+23°C): ±0.02% of set current + (±5 µA)
Accuracy (-25° to +50°C):
Typical: ±0.1% of set current + (±5 µA)
Worst Case: ±0.15% of full scale range + (±5 µA)
Minimum voltage drop across the internal current regulating circuit: 2.5 V @ 20 mA current flow
Maximum input voltage relative to channel ground: 20 Vdc
EMC Status: Complies with EN55022-1:1998 and EN50082-1:1998
Producing Area:USA