How To Identify The T:LAN MODBUS Options
T:LANs can be ordered with a variety of factory installed options. This post provides a quick guide on how to identify the options present in a particular unit. Please note that when ordering a T:LAN RTU, customers can specify whether the unit should be equipped with either a MODEM or a MODBUS module. As both of these optional modules share the same internal footprint they are mutually exclusive.
To find out about the hardware configuration settings of a T:LAN, log into the unit, then navigate to the GENERAL SYSTEM CHARACTERISTICS screen. Check the option shown under <5>:
| Factory Installed Option <5> | ||||
| ID | Enhancements | MODBUS | Power Out | RS-485 Bias |
| 0 | – | – | – | – |
| 1 | Rev4+ | – | – | – |
| 2 | Rev4+ | MODBUS | 12V | – |
| 3 | Rev4+ | MODBUS | 12V | – |
| 4 | Rev4+ | MODBUS | – | – |
| 5 | Rev4+ | MODBUS | 5V | – |
| 6 | Rev4+ | MODBUS | 12V | yes |
| 7 | Rev4+ | MODBUS | 24V (isolated) | yes |
Another way to identify the hardware configuration is to check out the Remote Commander Client OPTIONS column. It will identify the hardware configurations as follows:
- R4+ Neither MODEM nor MODBUS module installed:
- MODEM MODEM module installed:
- MBZ/R4+ MODBUS module is installed. No power-out option provided:
- MB5/R4+ MODBUS module is installed. Provides 5Vdc/100mA out:
- MODBUS MODBUS module is installed. Provides 12Vdc/100mA out:
- MB/R4+ MODBUS module is installed. Provides 12Vdc/100mA out:
- MBB/R4+ MODBUS module is installed. Provides 12Vdc/100mA out, with RS-485 bias:
- MB24/R4+ MODBUS module is installed. Provides isolated 24Vdc/100mA out, with RS-485 bias:
Ralf Doewich
Optima Tele.com, Inc.