National Instruments 321906B-01 用户手册
Appendix A
Specifications for NI 2503
©
National Instruments Corporation
A-5
NI 2503
Input Characteristics
Number of Relays Available
as Channels ............................................ 24
as Channels ............................................ 24
Common Mode Voltage
Channel to Channel......................... 30 V
rms
/60 VDC
Channel to Earth ............................. 30 V
rms
/60 VDC
Maximum Allowed Voltage—Differential Mode or Single ended
AC ................................................... 30 V
rms
DC ................................................... 60 VDC
Maximum Switching Capacity—Differential Mode or Single ended
DC ................................................... 1 A @ 30 VDC
Maximum Switching Power per
Differential Channel or Single ended..... 60 VA, 30 W
Differential Channel or Single ended..... 60 VA, 30 W
Contact on Resistance (Initial)
............... 100
m
Ω
Contact Material..................................... Gold-clad Silver Alloy
Transfer Characteristics
Thermal E.M.F. (Differential)................ <2
µ
V
Maximum Frequency Bandwidth
50 Ω
Termination
Worst case channel ......................... 35 MHz