---
title: Implementation...4CH
slug: implementation4ch
docTags: 
createdAt: 2024-08-07T19:40:42.703Z
---

The SCALAE RELAY is designed for rapid implementation of new and existing systems. 

## Installation Options

The module offers 2 recommended installation options. 

- **Direct Mounting**: For a more cost-effective mounting method, the module includes 4 mounting points. Four holes can be drilled, and aligned with the PCB Stand-offs are then used to mount it elevated from the mounting surface.
- **DIN Rail**: A sized DIN Rail mounting platform is available. The unit is inserted into the DIN Rail enclosure and then the assembled module is then added to a panel.

## Connections

### Power Supply

The PCB may be powered by one of the following options

1. An AC power source, the secondary side of a transformer can be used to power the PCB direction
2. Powered independently by a DC power supply, at around \~5vdc, 500 mA. Owing to this, activating an input is easily accomplished by closing or shorting the two pins.

:::hint{type="danger"}
Do not power the PCB directly from Mains or 120VAC | 220VAC.
:::

### Inputs

Completing the circuit to ground and the opto-couplers out is powered. This then drives the transistor and energizes the relay coil.

### Outputs

The relay used is a single pole, double throw. This enables each relay to be wired up either as normally open or normally closed. The module is labeled and a circuit diagram is provided to illustrate this connection.