1.0 Introduction

The GIOX unit can be used either for elevator control or for large scale general I/O (you cannot perform both functions on the same GIOX unit). It is made up of a motherboard, input modules, and output modules, all mounted to a back plate. The unit can be ordered with a Keri enclosure or be mounted directly to a surface.

The mother board has slots to accept up to 8 modules in any mix of input units and/or output units. An input module has 8 dry-contact inputs; each input is capable of being supervised. An output module has 8 relay outputs.

Mercury Powered NXT controllers can accommodate 1 GIOX unit on each Bus. The first GIOX unit must be on Bus 1, the second on Bus 2, up to Bus 4 (with a 4D controller). Elevator Control and general I/O are currently supported on Mercury Powered NXT controllers.

Standard NXT controllers can accommodate up to 4 GIOX units, 1 per Bus, with no restriction on Bus connection order. General I/O is currently supported on Standard NXT controllers; Elevator Control is NOT supported.

If you are using output modules, the GIOX must be powered by a separate, stand alone power supply as the NXT controller, via its RS-485 bus, cannot provide enough power to support a fully energized output module. When an external power supply is used, power via the RS-485 bus is ignored.

2.0 Unit Layout and Module Installation

The GIOX unit comes with the Motherboard already mounted to the Back Plate. Mount Input and Output Modules in a manner that makes your wire routing easy to manage.

There is a 2x5 header on each Input and Output Module that plugs into a corresponding connector on the Motherboard. There are 8 plug-in locations on the Motherboard. Modules can be placed in any order and in any location on the Motherboard. All Modules are secured using 6-32 screws, supplied with the individual modules.

Note: Keri strongly recommends not moving modules between locations once the installation has been done and hardware configuration has been performed in Doors.NET.

The RIM connection is made by aligning its 2x2 header and three stand offs to corresponding locations on the Motherboard, then pressing into place.

2.0 Unit Wiring

To Motherboard

Applications requiring Output Modules require an external +12 VDC power supply be used, TB62 (remove the power connection from TB61). The Motherboard automatically detects this and turns D16 ON if an Output Module is plugged in and an external supply is not used. When an external power supply is used, power via the RS-485 bus is ignored.

Any number of Input Modules can be installed using the standard power via RS-485 from the NXT controller. 

A standard Tamper Switch can be connected to TB63. Attach an optional Tamper Relay Board to TB64 for UL-294/CSA Class 4812 support. These TBs should be jumpered if these options are not used.

Table 1: Motherboard LEDs

To Input Modules

All inputs are dry-contact inputs.

All inputs are capable of 3-state and 4-state supervision. Please refer to the 3-State and 4-State Supervision Wiring for NXT Controllers application note (p/n 01228-001)

for information on using supervision.

Table 2: Input Module LEDs

To Output Modules

Table 3: Output Module LEDs

Output Protection

Transorbs are provided with the Output Module ship kit. They are used to protect the GIOX unit from voltage spikes induced on the output wiring by absorbing the excess voltage and slowly releasing it back into the circuit. Keri strongly recommends wiring in the transorbs provided with the GIOX ship kit. Refer to the Transorb Wiring Diagram below.

Wiring diagram also applies to second relay on terminal block.

Note: The Transorbs that Keri provides are non-polar; they can be installed in either orientation.

Isolation Relays

For locking devices that may induce heavy voltage spikes – Mag Locks and devices with heavy-duty solenoids such as turnstiles, vehicle gates, and overhead doors – Keri recommends using isolation relays. Keri has an Isolation Relay Kit (p/n IRP-1) for these applications. For detailed information please refer to the IRP-1 Isolation Relay Installation Guide (p/n 01833-001).

3.0 Specifications

Dimensions

Stand Alone Unit with Back Plate

• 15.45 inches wide by 11.56 inches tall by 2.00 inches deep

Unit in Standard Enclosure

• 17.25 inches wide by 15.25 inches high by 6.75 inches deep (including enclosure cover)

Power and Current Requirements

Power

• 10 to 14 VDC @ 3.0 A (maximum current draw for a fully loaded GIOX unit)

Current

Mother Board

• 100 mA (Mother Board only)

• 200 mA for attached RIM and Reader

Input Module

• 75 mA per Input Module

Output Module

• 300 mA per Output Module

Output Relay Contact Rating

• 1 A @ 24 VDC

Operating Conditions

• 32°F to 150°F (0°C to 60°C) – 0% to 90% relative humidity, non-condensing

Cable Requirements

The current demands of the GIOX motherboard, requires the GIOX unit be the only unit on the

RS-485 bus line. The total cable run distance should be no more than 500 feet from the controller (if the GIOX is being powered from the controller). If the GIOX module has its own, local power-supply and you are using Belden 9501 cable then the maximum cable run distance is 1200m/4,000feet.

Note: If you are powering the GIOX from the controller (if only input modules are used)Cable resistance causes a drop in voltage at the end of long cable runs. Ensure the

appropriate power and current for your device is available at the device at the end of the cable run.

Heavier gauge cable reduces this affect.