COM253 Spare Parts List and Upgrade Module Overview
COM253 is the core model of the LIQUISYS-M series transmitters, and its spare parts and upgrade modules are numerous. Based on the official spare parts list, this article organizes the order numbers, specifications, and selection key points of key modules to help engineering technicians and procurement personnel quickly locate the required components.
Spare parts are mainly divided into four categories: relay output modules, COM2x3 main modules, power supply and mounting accessories, and software upgrade packages. Correct selection can ensure system compatibility and long-term stability.
Relay Output Modules and Upgrades
Relay output modules are used to expand the digital output capability of the LIQUISYS-M basic version, supporting floating changeover contacts. Some models also integrate 4-20mA current input to meet more signal processing needs.
Relay Module Specifications and Order Numbers
| Order Number | Specification | Description |
|---|---|---|
| 51500320 | Relay output module | Upgrade LIQUISYS-M basic version, add 2 floating changeover contacts |
| 51511446 | Relay module | Upgrade LIQUISYS-M basic version, add 2 floating changeover contacts |
| 51500321 | Relay output circuit board | Upgrade LIQUISYS-M basic version, add 4 floating changeover contacts |
| 51511447 | Relay module | (Specifications not detailed, refer to similar) |
| 51504304 | Relay output module | Upgrade basic version, add 2 contacts and 4-20mA current input |
| 51504305 | Relay output module | Upgrade basic version, add 4 contacts and 4-20mA current input |
Note: 51500321 is a 4-relay board. If cleaning function upgrade is required and this board is not installed, it must be ordered separately.
COM2x3 Main Modules and Transmitters
The COM2x3 main module is the central processing unit of the system, supporting multiple communication protocols such as HART, Profibus PA/DP. Transmitter modules are used for specific parameter measurements such as oxygen, temperature, and pressure.
Main Module Order Numbers and Specifications
| Order Number | Specification | Description |
|---|---|---|
| 51501225 | COM2x3 main module | KIT COM2x3 Central module I1 |
| 51501223 | COM2x3 main module | KIT COM2x3 Central module I1 HART |
| 51501222 | COM2x3 main module | KIT COM2x3 Central module I2 |
| 51501226 | COM2x3 main module | KIT COM2x3 central module I2 HART |
| 51501227 | COM2X3 main module | KIT COM2X3 central module Profibus PA |
| 51502500 | COM2X3 main module | Kit COM2X3 central module Profibus DP |
| 71134729 | COM2x3 central processing module | PB DP; H/W 2.1x |
Transmitters and Special Modules
- 51501207: COM2x3 O2 transmitter
- 51501208: COM2x3 O2 transmitter with pressure
- 51506938: COM2x3 module MKO5 O2/temperature/pressure
- 71134732: Relay module, including 1x Profibus DP relay module, 2x relays, 1x current input DP connection, suitable for H/W 2.10 and above
Power Supply, Mounting, and Accessories
Power supply modules and mounting accessories ensure reliable power supply and mechanical fixation of the transmitter. When selecting, pay attention to AC or DC power supply, mounting method, and material.
Power Supply and Mounting Parts List
| Order Number | Specification | Description |
|---|---|---|
| 51500317 | CXM2X3 AC power supply | KIT CXM2X3 power supply AC |
| 51500318 | CXM2X3 DC power supply | KIT CxM2x3 power supply DC |
| 51501068 | KIT CXM253 instrument panel | KIT CXM253 housing cover |
| 71071446 | Kit CxM253 | Front foil + 6 key lifters |
| 51506966 | COM253 sensor panel socket | (No detailed description) |
| 51501073 | CXM253 internal mounting parts | KIT CXM253 Internal housing parts |
| 51517800 | Upgrade package | (No detailed description) |
| 51501072 | CXM253 mounting base plate | KIT CXM253 bottom of housing |
| 51501069 | Mounting hinges | KIT hinges |
| 51501079 | CXM223 terminal strip power supply | KIT CXM253 terminal strip power supply |
| 51501074 | CXM253 ribbon cables | KIT CXM253 Ribbon cables |
| 50086842 | LIQUISYS transmitter column mounting part | For horizontal or vertical pipe mounting, maximum diameter 60mm, material stainless steel V2A |
Software Upgrade Packages and Function Expansion
Software upgrade packages can expand the functions of the LIQUISYS-M basic version, such as adding pH, conductivity, temperature, chlorine, oxygen, and other parameters, or upgrading to the S version (plus-package). Some upgrades require the instrument serial number.
Upgrade Package Order Numbers and Descriptions
- 51500385: "Extended software" upgrade package, upgrades the basic version to the S version (adds pH, conductivity, temperature, chlorine, oxygen parameters), requires instrument serial number.
- 51501679: COM2X3 upgrade package, upgrades the basic version (parameter DO) to the S version, requires instrument serial number.
- 51500963: "Cleaning function" upgrade package, adds Chemoclean cleaning function, requires instrument serial number. If the 4-relay board is not installed, 51500321 must be ordered separately.
When purchasing upgrade packages, be sure to confirm the current hardware version and serial number to ensure compatibility.
Selection Recommendations and Precautions
- Confirm the basic version of the existing system and installed modules to avoid duplicate ordering.
- Select the main module according to communication requirements: HART, Profibus PA, or DP.
- Relay modules need to distinguish the number of contacts and whether they have current input.
- Power supply modules need to match the on-site power supply type (AC/DC).
- Software upgrade packages require the instrument serial number, and hardware compatibility should be checked.
Correct selection can maximize system performance and reduce downtime. If in doubt, it is recommended to consult official technical support.