Manual

ManualsBrandsWeidmuller ManualsHardwareWI-I/O 9-x & WI-I/O EX-1-S-x: Wireless I/O Transceiver v2.16

WI-I/O 9-x Wireless Module User Manual v2.16

WI-I/O-EX-1-S-x Serial Module

Page 16

The module may also be powered from an external 11.5 - 15 VDC battery supply without the need for a

"normal" supply connected to "SUP1". This external battery supply is connected to "BAT+" and

"GND" terminals. The positive lead of the external supply should be protected by a 2A fuse.

Upon failure of the normal supply, the module may continue to operate for several hours from a backup

battery. The module includes battery charging circuits for charging up to a 12 AHr sealed lead acid

battery. The battery is connected to the "BAT+" (positive) and "GND" (negative) terminals. The

positive lead from the battery should be protected with a 2A fuse, installed as near to the battery

terminal as possible. On return of main supply, the unit will switch back to mains operation, and

recharge the battery. To provide adequate current to recharge the backup battery, an AC supply of 15V

minimum or a DC supply of 17V minimum must be used. Typically, a 6 AHr battery will supply the

WI-I/O 9-x for 1 - 3 days, depending on I/O loads.

2.3.3 Solar Supply

The power supply also includes a 12 V solar regulator for connecting 12V solar panels of up to 30W,

and solar batteries of up to 100AHr. The unit must not be powered from a solar panel without a

battery. A 20W solar panel is sufficient for most solar applications. The size of the solar battery

required depends on the I/O used. Batteries are sized for a number of sunless days with 50% battery

capacity remaining as follows:

No. of sunless days = Battery capacity (AHr) x 0.5

Module load (A) x 1.2 x 24

The Module load depends on the I/O connected and can be calculated as follows:

Module Load(mA) = (85 for WI-I/O 9-x or 45 for WI-I/O-EX-1-S-x) + (10 x No. of active

DI’s) +

(25 x No. of active DO’s) + (2 x Analog loop load).

Optional Battery

Fuse 2A

SUP1

SUP2

GND

SOL

Power

Supply

DC Out

BAT+

GND

- +

WI-I/O 9

–

30 VDC

>17V if battery

is used