The NI CB-37FV is a vertical connector block that mounts perpendicular to the DIN rail. It has screw terminals for connecting up to 37 I/O signals, 12 to 30 AWG. It also has a female 37-pin D-Sub connector for connectivity to NI Compact FieldPoint, C Series, or industrial M Series devices.
CAUTION: NI products typically must be operated with shielded cables and accessories to ensure compliance with Electromagnetic Compatibility (EMC) requirements. To determine if shielded cables or accessories are required for your NI product, refer to the EMC specifications in the product’s user guide or manual. If shielded cables or accessories are required for EMC compliance, do not use unshielded cables or accessories unless they are installed in a shielded enclosure with properly designed and shielded input/output ports and they are connected to the NI product using a shielded cable. If unshielded cables or accessories are not properly installed and shielded, the EMC specifications for the product are no longer guaranteed.