Chapter Three
Installation
MAN_905G_1.16
Page 32
On return of normal supply, the unit will recharge the battery. The maximum output of the
battery charger is 0.7A when the supply voltage is greater than 12V, and 0.3A for less than
12V.
The 105G monitors the power supply and provides the following internal values, which can
be mapped as I/O values:
•
Power failure (I/O Reg 4309) - if the supply voltage drops below 8V, this status value is
set on, and set off again when the voltage is more than 9V. For AC Supplies, this
indicates low voltage at approximately 10 VAC, and the status is cleared when the supply
voltage rises above approximately 12VAC
•
Low battery voltage (I/O Reg 4308) - this status value is set on if the battery voltage
drops to 11.3, and resets off when the battery voltage is more than 11.8V.
•
Battery voltage value (I/O Reg 4310) - 8 – 40VDC corresponds to hex 4000 – hex C000.
•
Supply voltage (I/O Reg 4311) - 8 – 40VDC corresponds to hex 4000 – hex C000.
3.3.3
Solar Supply
A 105G can be powered from a solar supply using an external regulator. If a 12V solar
supply is used, the 12V battery can be connected to the battery supply connections of the
105G and the 105G will monitor for low battery status and also battery voltage. If a 24V
solar supply is used, the 24V battery should be connected as a DC supply (SUP1 and GND) -
the supply voltage can be monitored however the “supply fail” voltage will activate too low
to be used as a battery fail status.
3.4
Input / Output
The 105G has eight on-board discrete/digital I/O. These act as both discrete inputs and
discrete outputs.
3.4.1
Digital Inputs / Outputs
All eight of the 105G DIO terminals may be used as discrete inputs. These inputs are
suitable for voltage free contacts (such as mechanical switches) or NPN transistor devices
(such as electronic proximity switches). PNP transistor devices are not suitable. Contact
wetting current of approximately 5mA is provided to maintain reliable operation of driving
relays.
Each digital input is connected between the appropriate “DIO” terminal and common
“COM”. Each digital input circuit includes a LED indicator which is lit when the digital input
is active, that is, when the input circuit is closed. Provided the resistance of the switching
device is less than 200 ohms, the device will be able to activate the digital input.
+
_
DIO
DIO
GND
105U-G
Voltage-free
contact input
Transistor
input
V
+
V
-
