Rockwell Automation 1791DS-IBxxxx Guard I/O DeviceNet Safety Modules - Manual (Page 144)

144 Rockwell Automation Publication 1791DS-UM001J-EN-P - May 2013
Appendix A Get Point Status from Modules by Using Explicit Messaging
This figure shows the 1791DS-IB4XOW4 Assembly819 UDT.