Perle Systems Sds4 Manual do Utilizador descarregar pdf (Página 51)

100

101

Hardware and Connectivity 50

Powering up your IOLAN

Wiring up a DHV unit

Terminal # Description Usage

1 Normally Open Normally Open is a fail-safe relay connection. Use this with the

Common terminal to act as switch contacts that remain open when

the unit is powered off or in a failure state.

2 Common Common is a fail-safe relay connection. Use this terminal in

conjunction with the Normally Open or Normally Closed terminals.

3 Normally

Closed

Normally Closed is a fail-safe relay connection. Use this with the

Common terminal to act as switch contacts that remain closed

when the unit is powered off or in a failure state.

4 Chassis Ground Chassis Ground must be connected to "Equipment Ground" for DC

installations or "Safety Ground" for AC installations.

5 + / L (source 1) + / L (Source 1) is connected to the positive (+) input for DC

sources or to the Live input for AC sources. Use with partner

terminal -/N(Source 1).

6 - / N(source 1) - / N (Source 1) is connected to the negative (-) input for DC

sources or to the Neutral input for AC sources. Use with partner

terminal +/L(Source 1).

7 + / L (source 2) + / L (Source 2) is connected to the positive (+) input for DC

sources or to the Live input for AC sources. Use with partner

terminal -/N(Source 2).

8 - / N(source 2) - / N (Source 2) is connected to the negative (-) input for DC

sources or to the Neutral input for AC sources. Use with partner

terminal +/L(Source 2).

E Earth Ground Earth Ground is a connection to the chassis that can be used for

earth bonding.

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