RM-26999 Back Panel

Figure 10. RM-26999 Back Panel


  1. Hazardous Voltage Ports (AI0..AI3)
  2. Functional Earth Ground Terminal
  3. Current Transducer Ports (AI4..AI7)

Hazardous Voltage Ports

The hazardous voltage ports have 10 MΩ attenuators, connected to ground and fixed at 200:1 on each input path. The input path also includes an offset null multiplexer and a buffer amplifier to drive signals to the DAQ Multifunction I/O Module connected to the RM-26999.

Table 12. Hazardous Voltage Ports
Port Signal NI-DAQmx Channel
Voltage 0 AI0 MIODevice/ai0
Voltage 1 AI1 MIODevice/ai1
Voltage 2 AI2 MIODevice/ai2
Voltage 3 AI3 MIODevice/ai3
Figure 11. Hazardous Voltage Signal Path


Note NI recommends using a twisted, shielded pair cable for noise immunity. The hazardous voltage ports have corresponding Functional Earth Ground screws for terminating the shielded cable drain wire.
Figure 12. Twisted, Shielded Pair Connections


Functional Earth Ground Terminals

Refer to RM-26999 Safety Guidelines for more information about these terminals.

Current Transducer Ports

Refer to RM-26999 Pinouts for more information about these ports.