Perle Systems 4030370 Manuale Utente

Hardware and Connectivity  50

Powering up your IOLAN

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.