Output Devices - Hach BioTector B7000i User Manual

8.3.5 Output Devices

POWERED ALL TIME
VALVE ACTIVATION
RELAY 17-20
NO  POWERED ALL TIME parameter specifies if the relays are
powered all the time even if the system is stopped or paused
with the YES setting, or if the relay is powered only when
required with the default NO setting.
 VALVE ACTIVATION determines the two possible times for the
SPF/SAMPLER
multi-stream valve to change over for the next stream. If the
default SPF (SAMPLE PUMP FORWARD) option is selected,
the valve for the next stream is selected as the Sample Pump
starts to run forward to bring the sample from the next stream. If
SPR (SAMPLE PUMP REVERSE) option is selected, the valve
for the next stream is selected when the Sample Pump reverse
operation is completed for the current stream, or when the
BioTector powers up.
 If SAMPLER is activated in Stream Program menu, SPF option
is displayed as SPF/SAMPLER.
 OUTPUT 17-20 menus contain system standard and optional
output relay settings. Relay terminals 17-20 are located on the
Relay PCB.
 RELAY 17 is a programmable system relay (24V DC OUTPUT
with a maximum output current of 750mA). The default setting of
Relay 17 is MANUAL 1 if this option is installed into the
BioTector.
 RELAY 18 and 19 are freely programmable system relays
(VOLT FREE CHANGEOVER CONTACT with a current rating of
1Amp at 30V DC), which are supplied with every BioTector as
standard. These relays are typically not programmed to any
output function by default. See below example for the output
settings of RELAY 18.
 RELAY 20 is a programmable system relay (volt free
changeover contact with a current rating of 1Amp at 30V DC),
which is supplied with every BioTector as standard. The default
setting of Relay 20 is STOP and FAULT. See also below
example for the output settings of RELAY 20.
 RELAY 17-20 can be programmed to a single output function or
to multiple output functions if the relevant output option has been
installed in the BioTector. The programmed output function or
functions are marked with an asterisk "*" sign in these menus as
in the example for RELAY 18, which is programmed for
MAINTANENCE SIGNAL and CALIBRATION SIGNAL below.
 When multiple functions are programmed for an output relay, the
relay output is activated when one or multiple conditions are
initiated. In the example below, RELAY 18 is activated when
MAINTANENCE SIGNAL or CALIBRATION SIGNAL is
triggered. RELAY 20 is activated when BioTector is stopped or
when there is a fault in the BioTector.
 In BioTector configuration data download (or in All Data
download), the programmed output functions for each output is
tabulated and marked with asterisk "*" signs for clarity.
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