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Appendix A Specifications
6527 User Manual A-2 ni.com
Max switching voltage
AC....................................................30 V
RMS
(42 V peak)
DC....................................................60 VDC
Max switching capacity..........................120 mA
1
Common-mode isolation ........................60 VDC
30 V
RMS
(42 V peak)
(channel-to-channel and
channel-to-computer)
On resistance...........................................35 Ω max; 25 Ω typ
Output capacitance .................................55 pF at 1 V
Off leakage current (max).......................200 nA
Relay set time (max)...............................3.0 ms
Relay reset time (max)............................3.0 ms
Power-on state ........................................Relays open
Overcurrent protection on outputs, typical at 25 °C, V
relay
=7V
Current limit ....................................260 mA
Shutdown time.................................1 µs
Overcurrent duration (max).............1 s
Power Requirement
+5 VDC (±5%) .......................................500 mA max
Power available at I/O connector............+4.5 to +5.25 VDC, fused at 1 A
1
With all relays carrying 120 mA and all inputs driven to 28 V, the total power dissipation can approach 20 W. The maximum
switching capacity in PCI and CompactPCI systems must be derated according to the ambient temperature and cooling
capacity of your system to prevent the device from overheating. (The PXI chassis has built-in fans to handle 25 W per slot.)