Appendix A Specifications
SCXI-1125 User Manual A-8 ni.com
Maximum Working Voltage
Maximum voltage rating refers to the signal voltage plus the common
mode voltage (Signal + common mode). Voltage of each input shall remain
within 300 V of ground.
Channel-to-earth.....................................300 V, Measurement Category II
Channel-to-channel.................................300 V, Measurement Category II
Cautions The SCXI-1125 is rated for Measurement Category II and is intended to carry
signal voltages no greater than 300 V. Do not use the SCXI-1125 for connection to signals
or for measurements within Categories III or IV.
When hazardous voltages (>42.4 Vpk/60 VDC) are present on any channel, all channels are
considered hazardous. Ensure that external wiring or any circuits connected to the device
are properly insulated from human contact.
Environmental
Operating temperature............................0 to 50 °C
Storage temperature................................–20 to 70 °C
Humidity.................................................10 to 90% RH, noncondensing
Maximum altitude...................................2,000 meters
Pollution Degree (indoor use only) ........2
Table A-2. Terminal Block Maximum Voltages
Module Signal Range Maximum Voltage and Category [Insulation]
SCXI-1313A 150 V 150 V, Measurement Category II
[channel-to-channel, channel-to-earth]
SCXI-1327 300 V 300 V, Measurement Category II
[bank-to-bank, bank-to-earth]
TBX-1316 600 V 600 V, Measurement Category II
[Basic; channel-to-channel]
1000 V 1000 V, Measurement Category I
[Basic; channel-to-channel]