Eaton CROUSE-HINDS Series Instruction Manual page 9

5 .1 DC Power Requirements
Power terminals requiring a nominal input voltage of 24VDC are provided allowing the
use of bulk power supplies with a supply range of 19.2–30VDC (10–30VDC for the
F104). Input power cabling and over-current protection devices must be chosen to
match the current consumption.
Typical input current at 24VDC input for a fully loaded F10x is shown in the table below.
The input current is load and input voltage dependent. To determine the expected
input current for a specific application, see the graphs in the F10x Product Specification
document. If the power is 'daisy-chained' using the top-mounted F10x connectors,
size the input fusing accordingly and keep the total current below 8A. Each F10x
module contains an internal 1.5A fuse (not user replaceable).
It is also important to size the Bulk Power Supply to handle the inrush current required
by the F10x. Inrush is less than 3 times the maximum rated current with a duration
lasting less than 2ms.
5 .2 Power Connector Wiring
There are two pairs of positive and negative terminals on the input power connector.
The pairs are internally connected together to allow 'daisy-chaining' of power from
one unit to another. Wiring of two independent power supplies (for redundancy) to the
input power connector is not permitted unless external steering diodes are included in
each source of supply. DC supply connections are as follows:
Cable lengths on the Power connectors should not exceed 30m nor go outside the
building.
It is important to note that because the input wire pairs are internally connected on
the F10x printed circuit board, unplugging the 4 way connector will disrupt the daisy
chained power. To prevent unexpected loss of power downstream of the F10x, the
bulk power should be routed to each end of the daisy chain. This way, unplugging one
F10x 4 way connector will not disrupt other devices.
INM F10x Rev 1
Module Input Current
F101 550mA
F102 700mA
F104 200mA
Input Power
Pin No. Connection
7 +ve
8 -ve
9 +ve
10 -ve
5