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Product information Wireless data loggers
TAB. 5: Number of data loggers in the system as a function of the data
transmission interval
Data transmission
interval
1 s
2 s
5 s
Table 5 refers to the case of direct connection among the base unit and the data loggers (1 "Hop") in HD35....E (868 MHz) and HD35....U
(902-928 MHz) systems. If repeaters are present, the transmission of the data requires more time and the number of data loggers man-
ageable by the base unit could be lower than that reported in table 5.
The number of devices in the system (base unit + repeaters + data loggers) should not exceed 255.
Terminal header in the model HD35EDH
The model HD35EDH is equipped with three terminal header inputs. Each input can be configured as input for: Pt100/Pt1000, thermocouple,
0/4...20 mA (the shunt resistance is internal), 0...50 mV, 0...1 V or potentiometer. Only input 3 can also be configured as pulse counter (count-
ing of switchings of a voltage-free contact).
HD35ED-ALM alarm module
LEDs
Relays contacts
(protected by cover)
30
Number of data loggers manageable
by the base unit
12
24
60
Input 1
3-wire Pt100 / Pt1000
Example of connection of HD35EDH model inputs
Power supply
External RF
antenna
Battery autonomy
Transmitting frequency
Antenna
Transmitting range
Keyboard
LED indicators
Relay
Working temperature and
humidity range
Connection
Housing
push-
button
Weight
Installation
Data transmission
Number of data loggers manageable
interval
10 s
15 s
> 30 s
Input 2
Input 3
ON/OFF
contact
4-20 mA transmitter
Internal 3.6 V lithium-thionyl chloride (Li-SOCl
rechargeable battery, size A, Molex 5264 2-pole
connector
1 year in typical operating conditions
(the actual autonomy depends on how often the
alarm condition is generated)
868 MHz, 902-928 MHz or 915.9-929.7 MHz
depending on the model
Internal
See table 2
Push-button for connection / PING (for testing RF)
Presence of alarm, battery charge level,
RF communication status.
2 bistable relays with voltage-free contact
Contact: max 1A @ 30Vdc resistive load
-10...+70 °C / 0...85 %RH not condensing
Plastic material
Dimensions 135 x 110 x 33 mm
200 g approx. (including battery)
Wall mount support (supplied) for removable
installation or flanges (optional) for fixed installation
by the base unit
120
180
254
) not
2
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