Relay - Siemens SITRANS CU02 Operating Instructions Manual

Operation

5.3 Relay

5.3 Relay
The SITRANS CU 02 has two onboard programmable relays (P10/20). Under normal
operation, the relays are energized (normally open contact closed). Under alarm condition,
the `alarm' flag starts flashing immediately, indicating that the relay delay (P13/ 23) has
started counting. If the alarm condition ceases before the relay delay expires, the flashing
`alarm' flag is aborted. If the relay delay expires, the relay de-energizes and the contacts
change state. The `alarm' flag ceases flashing and remains on. Upon resumption of normal
operating condition, the `alarm' flag disappears. The relay and relay delay reset manually or
automatically depending on the mode selected (P14/24). If automatic, the reset is immediate.
If manual, the reset occurs upon actuation of the reset button (latch).
Each relay is programmable for either:
high alarm:
low alarm:
out of bound:
in bound:
①
②
③
④
⑤
⑥
18
alarm condition occurs when the sensor signal
level (%) is of a greater value than the high%
setpoint.
alarm condition occurs when the sensor signal
level (%) is of a lesser value than the low%
setpoint.
alarm condition occurs when the sensor signal
level (%) is of a greater value than the high %
alarm setpoint or of a lesser value than the
low% alarm setpoint.
alarm condition occurs when the sensor signal
level (%) is of a value between the low% and
high% alarm setpoints
Off
On
e.g. alarm above 80%
e.g. alarm below 20%
e.g. alarm beyond 20% and 80%
e.g. alarm between 20% and 80%
Operating Instructions, 03/2017, A5E40873245_AA
SITRANS CU02