Digital Input Module; Tariff Input Module - Iskra MC320 User Manual

SETTINGS
Alarm groups connected to a specific output module can also be defined via keyboard.
Main menu  Settings  Inputs/Outputs  V/I 1 / 2 / 3 / 4  Setting of alarm output OK
SIGNAL SHAPE:

Normal − a relay is closed un l condi on for the alarm is fulfilled.

Normal inverse − a relay is open un l condi on for the alarm is fulfilled.

Latched − a relay is closed when condi on for the alarm is fulfilled, and remains closed un l it is reset
via communication.

Latched inverse – a relay is opened when condition for the alarm is fulfilled, and remains closed until it
is reset via communication.

Pulsed − an impulse of the set length is sent always when condi on for the alarm is fulfilled.

Pulsed inverse − a pause of the set length is sent always when condi on for the alarm is fulfilled.
Otherwise relay is closed.

Always switched on / off (permanent) – A relay is permanently switched on or switched off irrespective
of the condition for the alarm.
This possibility of permanent alarm setting enables remote control via communication.
Digital input module
Module has no settings. General purpose is to collect digital signals from various devices, such as (intrusion
detection relay, different digital signals in transformer station, industry ...). It is available in three different
hardware versions.
When used in DC mode it can also be used as a pulse counter from external meters (water, gas, heat ...). Its value
can be assigned to any of four energy counters (see chapter Energy on page 31).
Tariff input module
TARIFF INPUT
Has no setting. It operates by setting active tariff at a tariff input (see chapter Tariff clock on page 32). The
instrument can have maximal one module with 2 tariff inputs only. With the combination of 2 tariff inputs
maximal 4 tariffs can be selected.
ACTIVE TARIFF SELECTION TABLE:
Signal presence on tariff input
Active tariff
Input T1/T2
Tariff 1
Tariff 2
Tariff 3
Tariff 4
Measuring centres – MC320, MC330, MC350 & MC350H ‐ User's Manual
Input T3/T4
0 0
1 0
0 1
1 1
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