INSTALLATION GUIDE
NI CB-37F-HVD
High-Voltage DIN Rail Screw Terminal Block for Rack Mount Users
This guide describes how to install and use the National Instruments
CB-37F-HVD 37-pin D-SUB high-voltage (150 V) DIN rail terminal
block. The CB-37F-HVD has screw terminals for connecting up to 37 I/O
signals. Use 12–30 AWG wire to connect to the CB-37F-HVD screw
terminals.
Using the Terminal Block Safely with High Voltage
Signals
The CB-37F-HVD is UL recognized. You can use the CB-37F-HVD
terminal block with low-voltage or high-voltage products up to 150 V.
When hazardous voltages (>30 Vrms, 42.4 V
pk
, 60 VDC) are present on
any terminal, all terminals must be considered hazardous. Ensure that
external wiring or any circuits connected to the device are properly
insulated from human contact.
Caution
Failure to adhere to the following precautionary steps when connecting the cable
to a high-voltage NI device can result in electrical shock or death.
Caution
Before you begin installation, ensure that no high-voltage signals are connected
to your accessory.
Caution
Signal connections should be made by a qualified technician or service personnel.
Caution
When using this product with UL listed high-voltage PCI or PXI devices, the
connecting cable must be keyed for hazardous voltage (>30 Vrms, 42.4 V
pk
, 60 VDC)
using the 37-Pin High-Voltage Accessory Kit. This kit is provided with the PCI/PXI device
or can be ordered separately for replacement (part number 779445-01). Refer to the
37-Pin
High-Voltage Accessory Safety Kit Installation Guide
provided in the kit for installation
instructions.
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