PTZ-BOX 5.0 User manual, document edition: 13
16
Power supply
2.3.1
Main battery
The device is powered from 1 up to 3, lithium 3,6V size D internal batteries.
Batteries
–
depending on Customer order
–
can be designed to supply:
•
complete device, without built-
in GSM modem (1 ÷ 3
batteries),
•
built-
in GSM modem (optional) (1 ÷ 2 batteries)
.
Life time of device equipped with 1 battery is over 5 years, assuming:
•
registration period set on 60 min,
•
all of outputs, digital inputs and transmission ports (wire without terminators) are inactive,
•
LCD display is constantly switched off, keyboard not used,
•
operating temperature equals minimum of ambience temperature, -
25° C
,
•
provided maximum pulses frequency on LF input (2 Hz),
•
measured gas pressure p1=p1max,
•
measured gas temperature t=tmin.
The operating time of the GSM modem powered by batteries is dependent on the modem usage.
When battery charge reaches 10% of its remaining capacity, an alarm will be generated (
Battery
low
), it’s recommended then to perform battery replacement procedure.
2.3.2
Battery replacement
The battery replacement procedure must be carried out in accordance with the instructions given in
this chapter.
1, 2
- input of external power supply,
3, 4
- input of external power supply for
transmission ports,
5..8
- transmission ports COM1 and COM2,
9..10
- power output for external reserve
transducers,
11..14
-
controlling outputs, “open
-
collector” type,
15..18
- digital inputs DI1 and DI2,
19..22
- pulse inputs LF1 and LF2 from gas meter
(optional digital inputs DI3 and DI4),
23, 24
- tamper switch input from gas meter
(optional digital input DI5),
25, 26
- pulse input HF1 from gas meter (optional
digital input DI6 in NAMUR standard),
27, 28
-
pulse input HF2 from gas meter (shared
with encoder input and with digital input
DI7 in NAMUR standard),
29, 30
- input of SCR encoder or DI8 digital input,
31..34
- Pt1000 temperature sensor terminals,
35..40
- terminals for connection of external
pressure sensor P1 or P2.
Figure 3. Connection scheme (view after opening of terminals chamber
cover).
