Eurotherm 3116 PID Podręcznik Użytkownika Pobierz pdf (Strona 10)

3116 User Guide Part No. HA028005ENG Issue 2.0 May 04

ENG

3.4 Input/Output 1 (Relay or Logic)

This may be a logic input or a logic output or a relay output

Relay output normally open (Form A), 2A 264Vac resistive

Logic output to drive SSR (not isolated)

Logic level On/High - 12Vdc at 5 to 40mA max

Logic level Off/Low - <100mV <100µA

Digital Input (contact closure)

3.5 Output 2 (Relay or Logic)

This is optional and is output only. It may be relay or logic output as output 1.

3.6 AA Output Relay

Changeover relay (Form C) rated 2A 264Vac resistive

* General Note About Relays and Inductive Loads

High voltage transients may occur when switching inductive loads such as some contactors or solenoid valves. Through

the internal contacts, these transients may introduce disturbances which could affect the performance of the instrument.

For this type of load it is recommended that a ‘snubber’ is connected across the normally open contact of the relay

switching the load. The snubber recommended consists of a 15nF series connected resistor/capacitor (typically

15nF/100Ω). A snubber will also prolong the life of the relay contacts.

WARNING

When the relay contact is open or it is connected to a high impedance load, the snubber passes a current (typically 0.6mA

at 110Vac and 1.2mA at 240Vac). You must ensure that this current will not hold on low power electrical loads. If the

load is of this type the snubber should not be connected.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 39 40

Brak uwag

Eurotherm 3116 PID Podręcznik Użytkownika Strona 10