5.1.5 The ‘S’ contacts (RLY 1 to RLY 4) controlled by the DO blocks
Note:
This option is not available on all actuator types, see fig 5.2.
The actuator has four ‘S’ contact outputs that may be configured to report the status of the actuator
with signals such as Open Limit, Closed Limit etc. These are identified as S1 to S4.
In addition, an optional additional relay board can be fitted with four more relays. The status of these
relays is then adjusted by Foundation DO block commands on outputs Relay 1 to Relay 4. Setting the
appropriate DO block output to the value corresponding to the relay will energise the relay whilst the
output from the DO is present. Setting a different value will de-energise the relay. Note that these
relays are latching and, if energised, will not change state when the actuator power is removed. On
restoration of power the relays will be reset to their de-energised condition.
5.1.6 Foundation network control disable feature
Note:
This option is not available on all actuator types, see fig 5.2.
It is possible to set the ESD/HW_DI-4 input so that the actuator ignores open, stop, close, ESD, PST
and position control signals sent over the Foundation network. If the HW_DI-4 ESD / Net Disable
parameter in the Transducer block is set to ‘1’ then when the ESD input connection is detected as
being logic 1, Foundation control is not allowed. This feature is dependent of the Auxiliary mask
setting and can be configured as an NO or NC input. When the HW_DI-4 ESD / Net Disable parameter
is set to ‘1’, no hard-wired ESD will be available.
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