SDM-CD8S

With an SDM-CD8S, your data logger can control dc devices that have a moderate current load, such as solenoids, solenoid valves, dc motors, stepper motors, lights, horns, heaters, and fans. The SDM-CD8S is ideal for applications requiring only a few control ports, where a larger, high-powered relay module (such as the SDM-CD16S) is not necessary.

The SDM-CD8S has eight dc-voltage outputs and returns that can be switched on and off manually or under data logger control.

• When the manual control switch is in the ON position, outputs are controlled by the position of the individual rocker switches.
• In the OFF position the state of the relays is controlled by the SDM commands from the data logger.

The voltage range for this device is 8 to 26 Vdc. It can deliver up to 1 A per channel with a maximum of 6 A total for all channels. The power input (8 to 26 Vdc) powers both the outputs and the SDM-CD8S logic.

SDM Operation

The SDM-CD8S is a synchronously addressed data logger peripheral. Data logger control ports 1, 2, and 3 are used to address the SDM-CD8S, then clock out the desired state of each of the eight control ports. Up to 15 SDM-CD8S controllers may be addressed, making it possible to control a maximum of 120 ports from the first three data logger control ports.