RIO - Remote Input/Output Unit

Features

8 inputs - programmable to normally open or closed.
18 outputs
Provides connectors for 3 MRBD Multi-Relay Boards with drivers.
Easy connection in mounting box (included)
Easy programming of the unit from the AlphaPro programming tool for PC.
Connects by RS485 or RS232 to the AlphaCom exchange.
When using RS485, up to 10 units can be chained.
With RS485 the maximum distance from the exchange is 1 km.
Status LED on the board.
Built-in error indication
Power must be supplied locally if the RIO unit is mounted outside the exchange room.

Description

The Remote Input Output Unit (RIO) is a flexible way of connecting digital inputs/outputs to the AlphaCom exchange. The devices can operate on point to point connections (RS 232) or on a multidrop bus (RS 485)

The RIO Unit has two circuit boards - the RIO board and the IICE board (Inter IC Connection Board).

Each RIO unit has 8 inputs and 18 outputs. The outputs are connected to the relayboard MRBD. Each MRBD has 6 relays. If all 18 outputs are used, 3 MRBD boards are required. The RIO and the MRBD are interconnected with a cable included with the MRBD. The RIOs can be mounted away from the exchange room, thus reducing cabling. If response time is critical (<2sec), as in audio control, the internal RCIs and RCOs in the exchange should be used.

The RIO is used for:

Distribution of remote control outputs (RCOs) from the AlphaCom exchange such as door opening, video camera control, additional call indications etc.
Connection of technical alarm inputs (RCIs). The alarm inputs can be signals coming from temperature control devices, fire panels, burglar alarms etc. The AlphaCom itself provides 6 RCI (2 in ACM) inputs, this can be increased to 140 RCIs by using the maximum number of RIOs.

Connectors and Switches

RIO Board

Connectors and switches on RIO board

IIEC Board

Connectors on IIEC board

Serial Interface setting on the RIO Board - Switch S1: 8

RIO Switch 1-8

Address setting - Switch S1:1-6

Address Switch-settings RIO

RS 495 bus

The RS 485 bus can be maximum 1 km long. Up to 10 RIOs can be connected to the bus. The data pair must be terminated in each end with a resistor equal to the cable impedance, typically 150-ohm.

When connecting the RIOs to the bus, wire stubs must be kept as short as possible, preferably less than 0.5 m. All RIOs must be connected to a common GND reference conductor.

NOTE: Use local power supply for each RIO.

NOTE: Do NOT use the GND reference for power distribution.

RS 485 bus overview

Installation

Switch Setting