NX12
Micro GSM RTU
© Nortech Management Ltd, United Kingdom
Page 24 of 25
8
Specification Data
8.1
General
AC supply
(AC powered units only)
100-240V AC, 50-60Hz.
100mA rated current.
See additional information below.
DC supply
(DC powered units only)
12-24V DC.
500mA rated current.
Battery
(where connected)
Lithium-thionyl chloride (Li-SOCl
2
).
Nominal 5.8Ah.
3.6V single cell pack. Lithium content approx. 3.4g.
7.2V twin cell pack. Lithium content approx. 6.8g.
Maintenance interval 10 years or when exhausted.
Local Indication
Surface mount LEDs.
Hardwired Digital Inputs Qty 16. Configurable as alarm or counter inputs.
Hardwired Digital
Outputs
Qty 8. Transistor outputs.
Hardwired Analogue
Inputs
Qty 8. 0-25mA inputs. Configurable alarm thresholds.
Additional I/O
Additional I/O is achieved via the RS485 Modbus
interface.
Local Serial Data
Modbus over 3 wire RS485.
Remote Indication
GSM modem with SMA antenna. NEXUS protocol,
supported on the iHost system.
8.2
AC powered units
The NX12 requires a two (2) wire AC supply. Connect with the correct polarity.
It is the users’ responsibility to ensure that local wiring regulations are complied
with during installation.
It is recommended that a Ferrite be fitted to the AC power cable (suitable part
Wurth Elektronik, PN 742 700 44).
The power supply to the RTU should be:
1.
Connected via a switch or circuit breaker.
2.
Close to the RTU and within easy reach of an operator.
3.
Marked as the disconnection device for the RTU.
8.3
DC powered units
The NX12 requires a DC supply. Connect with the correct polarity.
It is the users
’ responsibility to ensure that local wiring regulations are complied
with during installation.
