Churchill Nano Link IP67, Technical Manual, Page: 8 / 42

Page 6
3. Product Description
3.1 General
Nano_Link
is housed in a compact plastic enclosure, which includes an internal power supply and radio or modem, and
can be clipped onto a standard DIN rail. It can be supplied in waterproof polycarbonate enclosures if required.
The internal power supply can be three ‘D’ alkaline batteries, a mains power supply with battery back-up or an external
12VDC source (such as a solar power supply). The module has been optimised for low power consumption, to the
extent that it will operate for over 2 years on low-cost Duracell batteries. Battery operation has the advantage of
significantly lower installation and running costs.
The internal communications device can be either a radio or a modem. The radio is normally operated on a de-
regulated UHF band, so doesn’t need a licence. The modem can use either a leased line (owned by a national network
provider) or a private wire (owned by the user).
Nano_Link
can also be used with external communications devices
connected to the
Comms_Link
port.
Nano_Link
has 4 digital inputs, which can each be used to monitor alarm or status conditions, and also to count pulses
from totalised flow transducers. Pseudo digital inputs flag communications fail alarm and battery low alarm
conditions. It also has 2 analogue inputs, which can be used with low-cost millivolt transducers or conventional current
loop transmitters. A pseudo analogue input monitors the battery voltage and another monitors the radio receive signal
strength.
Nano_Link
can also be equipped with 4 digital outputs, each comprising a volt-free relay contact, and two 0…20mA
analogue outputs. The state of each output can be monitored by LED indicators located adjacent to the relevant
terminals.
The capacity can be increased by a further 16 digital inputs and/or 16 digital outputs by adding optional digital
expansion modules.
Although
Nano_Link
is intended primarily for use as an outstation or repeater, it can be configured as a base-station to
provide a simple point-to-point link to another
Nano_Link
, transferring up to 2 analogues and 20 digitals in both
directions.
However, to access pseudo inputs, use repeaters, or use more than one outstation, a
Micro_Link
base-station should be
used. This is described in the ‘
Data_Link 2000
Technical Manual’
Nano_Link
Aerial
Line
Comms_
Link
(TTL)
I/O_Link
(I
2
C)
85
…265V
AC
45
…
65
Hz
1
0VA
In
ternal ba
tter
y
8…16VDC 0
.5A
16
…3
2VDC 0.5A
3…5.5VDC 1A
M
DIGITALS
M
CO OUTPUTS
INPUTS
CO
O/P
1 2 3 4 1 2 3 4
I/P
ANALOGUES
O/P INPUTS
1- 2- + 1- 1I 1+ 2- 2I 2+ -
1 2 3 4 5 6 7 8
Address
SWITCH 1
1 2 3 4 5 6 7 8
Channel Mode
SWITCH 2
Vin
L N
+
-
I/O
+ -