Oldham MX 43, Руководство пользователя, Страница: 29 / 67

6 – Digital Modules 29
The contacts are represented in silkscreen as voltage-free, with no alarm in
positive safety.
For the 4-relay module, only switches 1 to 4 are active.
E – Programmable relays
In its maximum configuration, the MX43 can manage 24 external relays (or 24
modules with 1 stated relay or 3 modules of 8, all stated relays). The relays are
programmable indivisually. The operation of each relay depends on its
configuration.
Each of the 6 detector events [AL1 - AL2 - AL3 – High-range excess – Low-range
excess – Failure] can control one or several external or internal relays. Several
events can be connected to the same relay.
Setting of relay parameters
The alarm limits governing the relays can only be set by the COM43 application.
- Normal : Relay operation as per the normal management of an alarm. (The
relay is launched only if the event exceeds the duration of time lapse).
- Buzzer function (releasable relays) : The same as in normal operation, with,
in addition, the release of the relay even if the event is still present. The time
lapses are:
. Duration of maintenance: Minimum time of activation, adjustable from 0 to
900 seconds.
. Automatic release: If activated, the time is adjustable between 15 and 900
seconds, beyond which the buzzer relay is automatically released.
. Reactivation: If checked, time is adjustable between 15 and 900 seconds,
beyond which the buzzer relay is reactivated.
Controls of the alarm relay.
- Logic equations of up to 4 levels of parentheses by the logic operators OR,
AND, NOR, and NAND. The result of the equation controls the relay.
- Polling operations (x over y). There must be at least “x” events over the total of
“y” to activate the relay. Optionally, the user may define whether a failure is
considered an event in the same category as an alarm.
F – Relay status indicator
The status of each relay is visualized by a red LED (Figure 18, F):
■ LED off: Coil not powered.
■ LED lit: Coil powered.
G – Relay output connectors
The normal resistive load of each contact is 2A / 250 V AC or 2 A / 30 V DC.
Connection
Refer to chapter 6 on page 35.
Configuration
Configured via the COM 43 application.