Issue
This article provides guidance on connecting MN Touchscreens to various MicroNet controllers, including both older and newer series. It covers remote and direct mounting scenarios, wiring configurations, and important considerations for maintaining system integrity.
Product Line
Satchwell MicroNet
Environment
Satchwell MicroNet Touchscreen
Cause
Improper wiring of MN Touchscreens can lead to:
- Communication failures between controllers and the touchscreen.
- Incorrect LAN addressing, causing sub LAN conflicts or inaccessible devices.
- Power supply interference, especially when isolation is not maintained.
- Hardware damage, particularly when mounting newer touchscreens on older controllers without modifying connector pins.
- System instability, due to missing or incorrectly placed jumpers.
These guidelines ensure consistent LAN behavior, prevent electrical faults, and maintain compatibility across controller generations.
Resolution
⚠️ Important Notices
- The MicroNet 50 series controllers (MN350, MN450, MN550, MN650 LCD and Touchscreen) have been withdrawn from sale.
- The IAC 420, IAC 600, and Touchscreen models have also been discontinued.
- No direct replacements are currently offered.
For more details, refer to:
- PA-00495 - Notice of Withdrawal - Satchwell Sigma (PDF)
- PA-00528 - End of Commercialization - Satchwell Sigma (PDF)
General Wiring Principles
- Touchscreen Addressing: Start at 1/2; avoid address 1.
- Sub LAN Numbering: Based on touchscreen address.
- Jumpers: Must be fitted across the top two auxiliary connector pins unless otherwise specified.
Remote Mounted Touchscreen (NCP)
Connected to MN550/MN650
- LAN A: Front-end or local interrogation.
- LAN B: Sub LAN controllers.
- Power: Separate 24V supply recommended for isolation.
Connected to MN500/MN620
- Same as above.
- Ensure jumpers are fitted on sub LAN controllers.
Direct Mounted Touchscreen (NCP)
Mounted on MN550/MN650
- LAN A: Front-end/local interrogation.
- LAN B: Other controllers.
- Jumpers: Remove from controller.
- Isolation: Not possible unless remotely mounted.
Mounted on MN500/MN620
- LAN A/B: Same as above.
- Jumpers: Remove from controller; touchscreen retains jumpers.
- Pin Modification: Cut pins 6 and 7 if mounting newer touchscreen on older controller.>p>
🔧 Once this modification has been carried out to the Touchscreen, the unit will no longer be suitable to run ARCnet communications.
🔧 Use MN50-TS-NCP (post-Q2 2007) for direct mounting compatibility.
Compatibility Notes
- 50 series and 100 series controllers can share the same LAN.
- Follow model-specific LAN connection guidelines.
