Mantracourt Electronics Limited
T24-RM1 User Manual
4
T24-RM1 Operation
The T24 RM1 can accept 8 T24 data inputs for each of the two relays, the total of the inputs compared to the
set point and mode of the relay channel affects whether the relay is energised or not. In addition when
considering the use relays attention should be paid as to what state the system will be in when the power is
off. The diagram below outlines how wiring and normal and inverse modes influence the state of relays.
(COM = Common, NO = Normally Open, NC = Normally Closed)
KEY:
Increasing Value _____ Relay Energised
_____
Alarm Activated
Decreasing Value --------- Relay Unenergised
______ Alarm Deactivated
Relays can change state due to the following events:
Arrival of T24 data from user defined T24 device that causes the relay output to trigger.
Triggering of digital input 1 or 2 (switch input) which if configured reset latched relays
Arrival of data from a specified data tag can reset latched relays.
A change in error state of a module specified in a relays list of inputs
The T24-RM1 also features a third Alarm relay. The Alarm relay is energised from start up, (connection made
between COM and NO). The relay de-energises if an error is detected, an error is classed as a timeout and
optionally can include Integrity error or low Battery. The Alarm Relay will return to normal once the source of
the error is removed.
NC
NO
COM
NC
NO
COM
Set Point
Set Point-Hysteresis
Set Point
Set Point+Hysteresis
Inverted
Operation
OPTIONAL LATCH
OPTIONAL LATCH
OPTIONAL LATCH
OPTIONAL LATCH
Wired in this configuration the alarm
would sound when the power is off
Wired in this configuration the alarm
would
not
sound when the power is off
Normal
Operation
