Precision-digital PD6200 User Manual download pdf (Page 62)

Model PD6200 Analog Input Rate/Totalizer Instruction Manual

Latching Relay (Lt-Clr)

Manual reset only after alarm condition has cleared

Condition LED Relay

Normal Off Off

Alarm On On

Ack (No effect) On On

Normal On On

Ack Off Off

In this application, the meter is set up for manual reset only after the

signal passes the reset point (alarm condition has cleared). Acknowledg-

ing the alarm while it is still present has no effect on either the LED or

the relay. When the alarm is acknowledged after it returns to the normal

state, the LED and the relay go off. Notice that the LED remains on,

even after the meter returns to the normal condition. This is because, for

latching relays, the alarm LED reflects the status of the relay, regardless

of the alarm condition.

Acknowledging Relays

There are two ways to acknowledge relays programmed for manual re-

set:

1. Via the programmable front panel function keys F1-F3 (Default:

F3 assigned to ACK)

2. Remotely via a normally open pushbutton wired across one of the

digital inputs and the +5 V terminals on the digital I/O modules.

When the ACK button or the assigned digital input is closed, all relays

programmed for manual reset are acknowledged.

+5 I1 I2 I3 I4 O1 O2 O3 O4 G

DO 1-4

GND

ACK

PDA1044 Digital I/O Module

12345678910

DI 1-4

Figure 19: Acknowledge Relays w/Function Key or Digital Input

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Precision-digital PD6200 User Manual Page 62