Measurement Computing WebDAQ 504 - Safety voltages; Signal connector

WebDAQ 504 User's Guide Specifications
26
Safety voltages
Connect only voltages that are within the limits specified in this table.
Table 20. Safety specifications
Parameter Conditions Specification
Voltage limits
Channel-to-earth ground
±30 V max, Measurement Category I
Isolation
Channel-to-channel
None
Channel-to-earth ground
None
Note 8: Measurement Category I is for measurements performed on circuits not directly connected to the electrical
distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that
powers equipment. This category is for measurements of voltages from specially protected secondary circuits.
Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits
powered by regulated low-voltage sources, and electronics.
Caution! Do not connect the WebDAQ 504 to signals or use for measurements within Measurement
Categories II, III, or IV.
Signal connector
Table 21. Screw terminal specifications
Parameter Specification
Connector types
4 BNC connectors
6-position screw terminal for digital connections
Terminal wiring
14 to 30 AWG copper conductor wire with 5 to 6 mm (0.20 to 0.24 in.) of insulation
stripped from the end
Screw terminal
Table 22. Screw terminal pinout
Terminal Terminal
#
Label
Use
#
Label
Use
1 GND Digital ground 4 DIO2 Digital bit 2
2
DIO0
Digital bit 0
5
DIO3
Digital bit 3
3
DIO1
Digital bit 1
6
GND
Digital ground
BNC connectors
Table 23. BNC connector pinout
Terminal Terminal
#
Label
Use
#
Label
Use
1
AI0+
Channel 0 HI
5
AI2+
Channel 2 HI
2
AI0–
Channel 0 LO
6
AI2–
Channel 2 LO
3
AI1+
Channel 1 HI
7
AI3+
Channel 3 HI
4
AI1–
Channel 1 LO
8
AI3–
Channel 3 LO