Eltek Squirrel 1000 Series - Wiring up a Pulse Count Channel

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5.8 Wiring up a pulse count channel
Pulse count channels may be wired for a voltage input or a voltage-free
contact (see section 4.9.3 for details of voltages and mechanical contact
conditions). The positive connection should be made to the ‘+’ input and
the negative to the ‘-’ input. For a voltage-free contact input (e.g. relay),
the contact ‘debounce’ circuit must be connected. This involves linking the
‘-’ pin to the ‘s’ pin: -
s s
sensor output
volt-free contact
Note: the ‘-’ connection is ground and should be connected to the cable
screen, if any.
5.8.1 When 2 pulse channels are fitted, the connector is a 4 way:
+
-
S
x
sensor output
+
-
X = the additional channel input and is a function of the logger type. It is
configured for 200 Hz max frequency input and has debounce voltage-
free contacts fitted internally.