GP2 Specifications
Page
29
Power Supply Specifications
Internal
battery
6 x AA alkaline cells
External
power
IN: 10 to 15VDC, 2A via screw terminals or network cabling
OUT: 2.5A via network cabling
Mains
adapter
Accessory, provides 12VDC regulated, 2.5A
Sleep
current
< 60uA typical (-20 to +60 °C: 120uA)
Plus 30uA for each digital input held low.
<1mA (input regulator current) when running from external power
supply unit
Wake
current
<10 mA, plus any current supplied to sensors
Backup
GP2 draws current from internal battery or external supply,
whichever provides the higher voltage, so internal battery serves as
backup supply if external power fails. Internal backup capacitor
retains program state and maintains the clock for >1 hour for
battery change or if both supplies fail.
Low power
detection
3.09V to 3.42V shutdown to self-preservation mode
4.1 V analogue readings fail
User defined minimum power for analogue measurements
powered via PWR Bank A or B (below). Measurements invalidated if
requirement not met.
Sensor Power and Warm-up Specifications
Any of the sources below can be selected for powering sensors. Power is switched
when required, either immediately before a measurement or with 1s to 60s warm-
up duration in advance.
PWR Bank
A
5 to 10.5 V unregulated, 180 mA. Routed to PWR terminals of analogue
input channels CH1 to CH6.
PWR Bank
B
As PWR Bank A, routed to CH7 to CH12
REF 3V
Banks A, B
Calibrated 3V reference for bridge and potentiometer excitation,
±0.2 mV (-20 to +60: ± 0.9mV) 18mA. Routed to Bank A and B terminals, so
excludes use of PWR on the selected Bank.
WET PWR
5 to 10.5V, 50 mA min, 150mA max unregulated
+5V
5.0VDC ±2% (-20 to +60: ±3%), 50mA, shared with internal functions
+12V
12 ± 0.4VDC (-20 to +60: ±0.6VDC), 0.5A
Relays
RLY 1 to 6
Relay can be configured switch power to sensors from an independent
external supply.
