Part Number: 73-4100-xx (xx refers to the number of channels)
MicroRack
The MicroRackTM is the latest in controllers released by GasTech Australia. The heart of the MicroRack is the field proven 4100R controller card which can be used in either the MicroRack format or a standard 19" rack format. Having the one format for the 4100R card and two simple housing options makes these products the most versatile on the market. As the customer needs change in the future the system can be upgraded by adding 4100R cards as required.
List of Benefits
- 1 to 8 channels
- User upgradeable to 8 channels
- One processor per channel
- Universal inputs
- 2 individual alarms per channel
- 1 fault alarm per channel
- Analogue output per channel
- Individual Channel isolate
- local or global Accept/Reset
- Common alarms
- Internal amplifier
- Back lit graphical display per channel
- Constant individual channel indication
- High speed response
- Simple set-up
Our engineers have developed a highly reliable dual channel dual processor card. This card has two seperate circuits with only the High-Resolution display being shared. The display is a non-critical component, which does not influence the operation of the system. Both channels will still continue to operate correctly independently of the display.
What our engineers have developed is a dual channel dual processor card. This card has two separate circuitry with only a High-resolution display being shared. The display is a non-critical component, which do not influence the operation of the system. Basically if the display fails both channels will still operate correctly.
High Resolution Graphical LCD. This component has been selected due to its unique dual write feature. This allows both processors to write to the display at the same time. The top half dedicated to the top channel and the bottom half dedicated to the bottom channel. If one channel is off line, the display will continue to operate still displaying the working channel.
Card layout has been set up so the user can easily identify each channels circuitry and adjustment points. Switches, allow the user to set up the card to suit a number of different applications and field devices. Basic labeling on the PCB indicates the different settings, allowing minimal if any documentation for set-up, making the card the most user friendly on the market.
The “Isolate” feature allows a channel to be easily taken off line for calibration or modification, without actuating alarms or shutdown. The analogue output drops to 1.5mA while the channel is in isolate mode. The operator is alerted to a channel being in isolate mode by the inverted LCD, but still indicating the current reading. We have provided for a no “time out” option on this system. Being designed capable for "critical action" (Shutdowns), if a channel times out half way through a calibration procedure, an unwanted shutdown or deluge system could be activated. Also, a channel under maintenance for a long period, will continue to indicate to the operator that channel is off line. Simply turning off the channel is not acceptable, as the fault might never be rectified if there is no indication on the panel.
Available Models/ Parts
| Part Number |
Type |
| 73-4100-02 | MicroRack 2 channel PS 100w 240/110VAC relays + 4-20MA |
| 73-4100-04 | MicroRack 4 channel PS 100w 240/110VAC relays + 4-20MA |
| 73-4100-06 | MicroRack 6 channel PS 100w 240/110VAC relays + 4-20MA |
| 73-4100-08 | MicroRack 8 channel PS 100w 240/110VAC relays + 4-20MA |
| 73-4100 | GTA-4100R dual processor dual input card |
| Specification | Detail Description |
|---|---|
| Range | Adjustable to 2000 Reads %LEL, ppm, % Vol, PPMm, LELm and blank |
| Inputs | 1.4 to 24 VDC 4 to 20 mA analogue signal inputs, source or sink type, two or three-wire. 3 wire catalytic, 0-1V, 0-5V, 0-10V, 0-24V. 24V Digital, and resistance |
| Analogue Outputs | One 4 to 20mA source for each channel 1000 OHM maximum imdeadance @ 24 VDC input |
| Relay Outputs | Individual low AL1, high AL2, and Fault for each channel: Programmable for latching/non-latching Each relay rated at 1A/24 VDC Common relay low AL1, high AL2, and Fault. Each relay rated at 5A/24 VDC |
| Operating Voltage | 18 to 30 VDC, 24 VDC nominal |
| Power Supply | 240/110VAC 100W |
| Low Alarms | Independently adjustable from below zero to full scale. Audible/visual indication. Can be acknowledged. Can be activated on a rising/falling level. |
| High Alarms | Independently adjustable from below zero to full scale. Audible/visual indication. Can be acknowledged. Can be activated on a rising/falling level. |
| Buzer | Internal Buzzer |
| Channel Isolate | Individual channel indicated by inverted display and 1.5mA output on the analogue output. |
| Operating Temperature | -20˚C to +55˚C |
| Operating Humidity | 0 to 95% non condensing |
| Housing | IP65 powder coated aluminum |
| Overall Dimensions | 270 x 350 x 209mm |
| Weight | 4.2kg with one card and 100W power suply |
| Area Classification | General purpose |
| Warranty | Two year materials & workmanship |
MircoRack-Datasheet.pdf 448.5 KB
Manual - Current versions
GTA-4100R-Manual.pdf 6.19 MB
Application Notes
Application Note - MicroRack.pdf 259.06 KB