Pool Boiler Temperature Controller
Eurotherm 3508
As Shipped Configuration
| Order Code | Description | Comment | |
|---|---|---|---|
| Model Number | 3508 | 3508 Standard | |
| Function | F | Profibus | Profibus will not be used. |
| Supply Voltage | VL | 20-29 VAC/DC | Intended to operate on the boiler 24 VAC control circuit. |
| Loops | 1 | One Loop | |
| Application | XX | Standard | |
| Programs | X | No Programs | |
| Recipes | 1 | 1 Recipe | |
| Toolkit Wires | XXX | Standard 30 Wires | Purchased used; not relevant. |
| Fascia | G | Eurotherm Green | |
| IO Slot 1 | LO | Isolated Single Logic Output | |
| IO Slot 2 | D4 | DC Control | Will not be used. |
| IO Slot 3 | TK | Triple Contact Input | |
| H Comms Slot | PD | Profibus with D-type Connector | Profibus will not be used. |
| J Comms Slot | XX | Not Fitted | An RS485 module will be installed. |
| Config Tools | XX | None | |
| Product Language | ENG | English | |
| Manuals Language | ENG | English | |
| Warranty | XXXXX | Standard | |
| Calibration Certificate | XXXXX | None | |
| Custom Labels | XXXXX | None | |
| Config | STD | Standard Config | The remaining codes are all blank; no factory configuration. |
Modifications
Additional modules were purchased and installed, modifying the as-shipped configuration.
- Installed an RS-485 module (Eurotherm AH025075U002) in the J Comms Slot for MODBUS communication.
- Changes to IO Slot 2:
- Removed the DC Control module.
- Installed a Change Over Relay (Eurotherm AH025408U002) for SPDT 2A control.
Inputs
- The Triple Contact Input module provides three switch inputs. TBD: What is the "common" pin connected to?