Uninterruptible Power Supply (UPS)
with Intrinsically Safe Output and 25 Ah Battery Backup
Environments: Mining • Tunnelling
Features
- Robust stainless steel housing
- Regulated output is current limited and has continuous short circuit protection
- 25 Ah back-up battery with automatic uninterrupted power transfer
- 12 V, 750 mA Ex ia Ma certified output
- Analogue output signal to show battery charge status
- Volt-free contact to show mains input status
A diagram shows the UPS unit with its stainless steel housing and yellow control panel.
Benefits
- Can remain on standby battery power in Ex ia Ma area conditions
- Available power can be remotely monitored via the battery charge analogue output signal
- AC mains failure can be remotely monitored via a volt-free output contact
- Spacious termination facilities to connect heavy-duty mining cables
- Sealed unit requires no user maintenance or examination
- Ex eq certification eliminates any maintenance costs of Ex d style enclosures
Functional Overview
The power supply converts an AC supply voltage into a stabilised and regulated intrinsically safe source, ideal for supplying power to approved sensors and electronic control devices in hazardous areas.
Diagram illustrating the functional overview: 1. Mains input, 2. Intrinsically safe Ex ia output, 3. Ex ia Chamber, 4. Battery Chamber.
Technical Information
| Parameter | Specification |
|---|---|
| Input Voltage | 110 V ac ± 10% or 230 V ac ± 10% - 50/60 Hz |
| Output Voltage | 12 V dc -0 V/+0.6 V |
| Output Current | 750 mA |
| Output Ripple/Noise | 150 mV max |
| Line Regulation | <5% over the input voltage range |
| Load Regulation | <10% between 90% and 100% of load current |
| Voltage Limiting | Over voltage detection with crowbar protection and short circuit protection |
| Current Limiting | Automatic current limiting of the intrinsically safe output also limits the current to less than the rupturing capacity of the output protection fuse. |
| Max. Operating Temperature | -20°C to +40°C |
| Storage Temperature | -20°C to +70°C |
| Humidity | 0 to 95% RH, non-condensing |
| Vibration Limits/Low Frequency | 0.25 mm peak, sinusoidal vibration in the range 10 Hz to 100 Hz in 3 perpendicular planes |
| Medium Frequency | 2g peak, sinusoidal vibration in the range 10 Hz to 600 Hz in 3 perpendicular planes |
| Mechanical Shock | 1000 shocks of 40g minimum in 3 perpendicular planes |
| Housing Material | Stainless steel |
| Weight | 35 kg |
| Back-up Battery | Sealed lead-acid - 25 Ah |
| Power Fail Indication | Automatic uninterrupted output power transfer following input power failure. Relay contacts change state on power failure. Contact rating: 0.25 A at 30 V dc max. |
| Charge Condition | Analogue output signal proportional to the charge level of the battery. Choice of 0.4 V to 2.0 V or 4 to 20 mA signals |
| Battery life | 6 years with normal usage |
| Ex Certification | Group I - Please refer to user manual for full certification details |
Dimensions
Diagram showing the dimensions of the UPS unit, including the timer reset button, Exi Chamber, Mains Input Chamber, and Battery Chamber. Fixing holes and cable entries are also indicated.
Connections
Diagram illustrating the connections for the UPS unit:
- Exi Output: +V, V+, V0, V0, P1, P2, P3, C1, C2, C3, T1, T2
- Mains Input: 110V ac or 230V ac or 24V ac
Output Descriptions:
- +V = 12 V dc, intrinsically safe output
- 0V = 0 V, intrinsically safe output
Power Fail Relay:
- P1 = C
- P2 = N/C
- P3 = N/O
Charge Condition Monitor Output:
- C1 = 0.4 to 2 V
- C2 = 0 V
- C3 = 4 to 20 mA
Timer Control Terminals:
- T1
- T2
A remote link can be used to enable the Timer Function.
Battery Conserve Timer
The TX6648 Power supply is fitted with a Battery Conserve Timer. The timer is used to conserve battery power when used on mobile machinery where battery support will only be required for short intervals between long periods.
- The battery will be charged in the normal way when the main power is ON.
- The battery back-up output will be terminated 30 minutes after the main power is OFF.
- The battery back-up output may be re-instated at any time for a period of 30 minutes by operation of a pushbutton on the side of the power supply housing or a remote pushbutton connected to T1 and T2.
- The timer is disabled by fitting a link between T1 and T2.
Order Reference
ATEX & IECEx Certification
- 110 V ac supply: TX6648.35.105.101.1206.19
- 230 V ac supply: TX6648.35.106.101.1206.19
- 24 V ac supply: TX6648.35.103.101.1206.19
MASC Certification
- 110 V ac supply: TX6649.35.105.101.1206.05
- 230 V ac supply: TX6649.35.106.101.1206.05
- 24 V ac supply: TX6649.35.103.101.1206.05
An image shows a smaller UPS unit, similar to the one described.
Disclaimer
The information provided in this document contains general descriptions and technical characteristics of the performance of the product. It is not intended as a substitute for and is not to be used for determining suitability or reliability of this product for specific user applications. It is the duty of any user or installer to perform the appropriate and complete risk assessment, evaluation and testing of the products with respect to the specific application or use. Trolex shall not be responsible or liable for misuse of the information contained herein. When instruments are used for applications with technical safety requirements, the relevant instructions must be followed.
All pertinent state, regional, and local safety regulations must be observed when installing and using this instrument. For reasons of safety and to help ensure compliance with documented system data, only Trolex or its affiliates should perform repairs to components.
Trolex Ltd. reserves the right to revise and update this documentation from time to time without obligation to provide notification of such revision or change. Revised documentation may be obtainable from Trolex.
Trolex Ltd. reserves the right, without notice, to make changes in equipment design or performance as progress in engineering, manufacturing or technology may warrant.
Trademark
© 2025 Trolex® Ltd.
No part of this document may be reproduced in any form or by any means, electronic or mechanical, including photocopying, without express written permission of Trolex.
Trolex is a registered trademark of Trolex Ltd. The use of all trademarks in this document is acknowledged.
Trolex – At Trolex, we save lives. 60 years of our pioneering safety technology has helped keep workers protected in even the most challenging environments.
Trolex – At Trolex, we save lives. 60 years of our pioneering safety technology has helped keep workers protected in even the most challenging environments.
