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INSTRUCTION MANUAL
FieldLogger
with 128k Memory
0141 0315-57 01. April 2009
B+B Thermo-Technik GmbH | Heinrich-Hertz-Str. 4 | D-78166 Donaueschingen
Technical changes reserved
Fon +49 771 83160 | Fax +49 771 831650 | [email protected] | bb-sensors.com
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ELECTRICAL CONNECTIONS – POWER SUPPLY
Terminals 19 and 20 identified with POWER show the main power supply of the logger. As a backup power supply, in VBAT,
terminals 14 and 15, an extra power supply of +6 to +24 VDC can be connected so that the device can continue measuring and
logging operations in the failure of a main power supply.
While using the VBAT supply the logger can not use the serial communication and does not trigger ALM1 and ALM2
outputs.
ELECTRICAL CONNECTIONS – ALARMS AND DIGITAL INPUT
ALM1 and ALM2 outputs, terminals 21, 22, 23 and 24, correspond to relays used by alarms. NA contacts are available, with load
capacity of 3 A / 250 V.
A dry contact device should be used (switch, relay etc) in digital inputs, terminals 13 and 14. When the contact is closed, the digital
input is triggered.
Notice that when a digital input terminal is common to the VBAT negative it can be concurrently used to both ends.
D
neg.
D
GN
D
V-
Ba
t
+
Dig
.
In
Ch
. 4
Ch
.3
Ch
. 2
Ch
. 1
8 7 6 5 4 3 2 1 0
8-KanalDatenlogger
9 0 1 2 3 4 5 6 7
8 9 0 1 2 3 4 5 6
Po
we
r
Al
ar
m 1
Al
ar
m 2
Ch
.
5
Ch
.
6
Ch
.
7
Ch
.
8
Figure 10 - terminal lay-out