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2150EX Area Velocity Flow Module
Section 2 Preparation and Installation
2-13
2.4.6 Zone 1 Battery Module The Model 2196EX is a rechargeable battery module for zones 1
and 2 that offers indication of declining voltage prior to power
interruption, with two batteries permanently contained in an
IP68 enclosure. See Figure 2-10 for X marking and port labeling.
The 2196EX may be safely connected to or disconnected from a
2150EX flow module within a hazardous area.
Note
The 2196EX is for use in gas hazard zones 1 and 2. It is not
approved for use in zone 0 installations, in accordance with
IEC 60079-14.
The 2196EX module has no port or latches on the bottom of the
case; therefore, it can only be installed on the bottom of a module
stack. One 2196EX module can power one or two 2150EX flow
modules with sensors attached.
The 2196EX uses two fully rechargeable, nonreplaceable
lead-acid batteries.
Never operate or store the 2196EX at temperatures above 140 °F
(60 °C). Operate the 2196EX below 86 °F (30 °C) for maximum
service life. For prolonged shelf life, the 2196EX should be stored
at 50 °F (10 °C) or lower in a fully charged state.
Battery protection The module protects the lead-acid batteries from damage due to
deep discharge by first indicating critically low voltage through
Flowlink software, and then by shutting off when the voltage
becomes critically low.
As the 2196EX output voltage decreases to a value near the
7-volt shut-off threshold, Flowlink software will issue a
low-voltage warning (Figure 2-7).
Neither of these protective functions should become nec-
essary on a regular basis. Check the battery voltage
reading regularly, according to your specific application,
and recharge the batteries before the warning appears.
The voltage may also be tested with a voltmeter at the port con-
nector on pins c (+) and d (–), or on the internal circuit board (see
the test points shown in Figure 2-8).
Note
There is a 60K ohm resistor in series with the voltage sensing
circuit. The voltage reading measured on the circuit board may
have slight variance, depending on the voltmeter used.
2196EX port connector
+
–