CDN391 MKS Instruments DeviceNet 48 Bi-Directional Digital I/O Module

The MKS Instruments CDN391 / CDN391R DeviceNet 48 Bi-Directional Digital I/O Module provides a high density DeviceNet Digital I/O controller. The unit may be rack mounted in standard Euro compatible card cage, used in stand alone control systems or integrated into DIN rail mounted carrier. When used as an output the actual input state may be read to verify signal integrity.

On board monitoring of the digital supply voltages ensure that external power sources are within specification. Thermal monitoring provides both software as well as hardware control over a over temperature (FAN) output. Processor power is monitored to ensure integrity and all outputs are forced to an inactive state in cases of power degradation.

Rotary switches provide control over the DeviceNet MacID and Baud Rate settings. The DeviceNet signaling is optically isolated from all I/O. On board isolated DC-DC converters provide processor (+5 VDC) power from the DeviceNet 11-25 Vdc supply voltage.

The CDN391 supports standard DIP and DOP application objects for I/O interfaces. These objects are augmented with a Device Supervisor Object, a Device Configuration object and CCO application program objects.

User selectable options within the Configuration Object allow the CDN391 to be tailored to specific applications by limiting the data transfers to exactly match the I/O requirements. The configuration object also provides access to the thermal and power monitoring status and control bits.

CCO allows user application programs to be installed on the CDN391 to provide fast, real time control over digital points. CCO provides a Boolean control language supported by counters, timers and comparators.