National Instruments FieldPoint cFP-RLY-425 Operating Instructions Manual page 13

Calculate the maximum current as
Example 1. If eight channels carry 5 A each, the total current is
= 200 A
2
8(5 A)
this total current with an ambient temperature up to 60 °C.
Example 2. If two channels carry 5 A each and six channels carry
2 A each, the total current is 2(5 A)
can output this total current with an ambient temperature up to
70 °C.
Initial path resistance ........................ <50 mΩ
Note
the life of the relay. At the end of relay life, the path
resistance rises rapidly above 1 Ω . Load ratings apply
to relays used within the specification before the end of
relay life.
Off-state leakage current
At 125 VDC ............................... 0.03 µA
At 250 VAC ................................ 2 µA
Expected relay life
Mechanical ................................. 2 × 10
Electrical
At 5 A, 30 VDC ................... 1.5 × 10
At 3 A, 120 VAC.................. 1.5 × 10
At 5 A, 250 VAC.................. 3 × 10
Recommended cycle rate
With up to 3 A load .................... 1 s ON, 1 s OFF
With 3 A or greater load............. 3 s ON, 3 s OFF
Relay operate time ............................ <10 ms
Relay release time............................. <7 ms
Contact bounce time ......................... <1 ms
Contact material................................ Gold-plated silver alloy
© National Instruments Corp.
2
. As shown in Figure 11, the module can output
DC path resistance typically remains low for
7
2
∑
( )
I
n
n 0
=
+ 6(2 A)
2
13
= 74 A
2 2
. The module
7
operations
5
operations
5
operations
4
operations
cFP-RLY-425