BEKA BA654D, Manual

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7
Each relay output has a maximum contact
rating of:
240V 5A 2kVA
30V 5A
When a reactive load is being switched by the
relay contact, it is essential that a suppressor
is fitted to prevent contact damage and radio
frequency interference. A 0.1µF capacitor in
series with a 100
Ω
resistor connected between
the relay contacts will usually provide
adequate suppression. Proprietary
encapsulated suppression assemblies can be
purchased from electrical suppliers. Please
note that BEKA associates’ guarantee
excludes relay contact damage.
WARNING
These switch outputs should not be
used for critical safety applications.
When the BA654D power supply is turned off
or disconnected, all BA654D switch outputs will
open.
Notes: For applications requiring change-over
contacts, the BA654D can be supplied
with just Control 1 and Output 2 each
having one change-over contact.
Three additional outputs, each of
which may be configured to output one
of six signals, are available as a
factory fitted option. Each output is a
single pole isolated solid state switch
capable of switching a 30V, 100mA dc
load.
3.5 External switches
For application requiring the batch controller to
be controlled by large industrial pushbuttons,
four external switches may be connected as
shown in Fig 2.
Switch
number
Switch function when
Operating Configuring
S1
Start Down
S2
Stop Up
S3
Reset P
S4
Menu E
3.6 Inhibit link
Linking terminals 18 and 20 together inhibits
the batch controller input. If linked during a
batch, none of the outputs will change so
dispensing will continue, but the volume
dispensed while the link is connected will not
be added to the batch display. This facility is
intended for applications requiring pre-batch
purging, or re-circulation during batching to
maintain temperature or good mixing.
3.7 Security link
Access to the configuration menus is only
available when terminals 18 & 19 are linked
together. This may be achieved with a wire
link, or a keyswitch when frequent security
changes are required.