RIO - Remote Input/Output Unit

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

General Description

The RIO unit should be installed in a dry and dust free environment. There is easy access to connectors and DIP-switches through openings in the front plate. A 15 pin D-sub with 0,5m of color-coded cable is provided for the RS485 connector. The unit can be mounted to mounting rails.

The RIO unit can be installed in the following locations:

• At the connection field of the exchange.
• Elsewhere in the same room.
• Up to 1km away through the RS485 bus, with 10 units chained together.
• Up to 50 m away through the RS232 bus.

Note: if the RS232 connection is used, surveillance and debugging of the RIO is not possible.

Power supply

The RIO unit can use power from the exchange if it is installed in the exchange room; otherwise it must be powered locally.

Cable requirements

RS485

RS 485 bus overview

RIO mounted in the exchange room :

• 2 wires for data.
• 2 wires for power from exchange

RIO mounted outside the exchange room:

• 2 wires for data
• 1 wire for ground reference
• 2 wires for local power.

RS232

• 2 wires for data.
• 1 wire for ground reference
• 2 wires for power from exchange/local power

Installation of the RIO system

Power supply

If local power is used, a regulated 24VDC /1A power supply is necessary.

Note; this is NOT supplied from Stento.

If power from the exchange is used, a Power Distribution Board in the exchange is necessary.

CATION
Do not extend power cables from the PDB outside the exchange rack environment. Use local power for remote installation of equipment.

Installing the RIO Unit

The RIO unit is made up of 2 boards, the RIO board and the IICE board.

• Fasten the RIO unit to a mounting rail.
• Supply both boards with +24V and 0V (GND), each board has its own power connector.

A one-pair ordinary installation cable can be used. (Power cable is not supplied.)

• Connect a cable from one of the exchange's RS485 / RS232 ports to the RIO board.

There are 3 possible configurations as shown in Figure 6, Figure 7 and Figure 8:

• • A RS485 multidrop bus using power from the exchange, the 0V power connection is

also the GND reference for the bus.

• • A RS485 multidrop with local power, then a separate GND reference wire is

necessary. With the RS485 it is possible to connect up to ten RIO's to the same bus. This is indicated with the continuing bus, the next RIO will be connected the same way as the one shown.

• • A RS232 point to point with power from the exchange, with the usual TX, RX and

GND signals. A 15-pin D-sub connector with 0,5m cable is provided for connection to the RS485 bus. Note: a 9-pin D-sub for the RS232 connector is NOT provided.

• Check the switch setting

Installing Multi Relay Board MRBD

If only RIO inputs are used, this board is not necessary. But if RIO outputs are used, MRBD boards must be connected to provide 6, 12 or 18 relay outputs.

• Fasten the Relay Board beside the RIO Unit.
• Supply the board with 24 V and 0 V (GND) from the same power supply as used for the

RIO unit. Use a 1-pair ordinary installation cable for this purpose; the cable is not supplied with the board.

• Connect the RCO output cable between the Relay Board and the RIO.
• On the MRBD-board: Check that the jumpers are in position 2 - 3 on switches S1 to S6.
• Switch the power on.

Installation Examples

Figure 6, Figure 7 and Figure 8 show examples where the MRBD board is installed along with the RIO in order to provide additional RCOs.

Switch Setting

Switch Setting