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National Instruments FieldPoint cFP-RLY-425 Operating Instructions Manual page 2

Eight-channel spst relay module

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power that the network module can supply. Make sure the total
power requirement for all of the I/O modules in the bank is less
than the maximum power available from the network module.
Suppose you have a bank with a cFP-2000 network module,
three cFP-RLY-425 modules, and five cFP-DI-300 modules. The
cFP-2000 can supply up to 9 W. The cFP-RLY-425 requires
up to 1.45 W, and the cFP-DI-300 requires 0.185 W. Three
cFP-RLY-425 modules and five cFP-DI-300 modules require a
total of 5.28 W:
This power requirement is less than the 9 W maximum.
Installing the cFP-RLY-425
The cFP-RLY-425 mounts on a Compact FieldPoint backplane
(cFP-BP-x), which provides operating power to the module.
Installing the cFP-RLY-425 onto a powered backplane does not
disrupt the operation of the bank.
To install the cFP-RLY-425, refer to Figure 1 and complete the
following steps:
1. Align the captive screws on the cFP-RLY-425 with the holes
on the backplane. The alignment keys on the cFP-RLY-425
prevent backward insertion.
2. Press firmly to seat the cFP-RLY-425 on the backplane.
3. Using a number 2 Phillips screwdriver with a shank of at least
64 mm (2.5 in.) length, tighten the captive screws to 1.1 N ⋅ m
(10 lb ⋅ in.) of torque. The nylon coating on the screws
prevents them from loosening.
cFP-RLY-425
3(1.45 W) + 5(0.185 W) = 5.28 W
2
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