Description
The Yokogawa BT200-S1-N00 is a portable, microprocessor-based hand-held terminal designed for setting, changing, displaying, and printing parameters (such as tag numbers, output modes, and ranges) for field instruments utilizing Yokogawa’s proprietary BRAIN communication protocol. Connected directly across 4 to 20 mA DC signal transmission lines or dedicated communication ports, it allows operators to perform configuration, online monitoring, diagnostics, and zero-point adjustments without interrupting the live process control loop.
📊 Product Datasheet
| Parameter | Value |
| Brand | Yokogawa |
| Model / Suffix | BT200-S1-N00 (Non-Printer Model) |
| Series | BT200 BRAIN Terminal Series |
| Product Name | Handheld Field Communicator / Terminal |
| Origin | Japan / Global Manufacturing |
| Product Status | Active / Industrial Automation Spare Part |
| Display | LCD Dot Matrix, 21 Characters \times 8 Lines |
| Controls | Membrane Switches (4 Function Keys, 20 General Operation Keys, 1 Power Switch) |
| Dimensions | 228 mm \times 110 mm \times 51 mm (9.0 in \times 4.3 in \times 2.0 in) |
| Weight | Approx. 510 g (1.12 lb) |
| Country of Origin | Japan (JP) / South Korea (KR) |
| Power Supply | Five AA 1.5V Dry Alkaline Batteries (LR6/AM3) |
🛠️ Operation Standards and Usage Methods
🔸 Connection Procedure: Connect the terminal’s communication cable (equipped with clips) directly across the 4-20 mA DC signal lines (load resistance between 250 \Omega and 600 \Omega) or to the dedicated terminal on compatible Yokogawa field devices like DPharp transmitters, ADMAG magnetic flowmeters, or YTA temperature transmitters.
🔸 Safe Handling: Ensure proper handling in industrial environments. While designed for portable field use, avoid running communication lines parallel and close to high-voltage power cables to prevent electromagnetic interference (EMI).
🔸 Startup and Navigation: Power on the unit using the dedicated power key. Utilize the interactive English-prompting menu on the 8-line LCD to upload/download device data, check diagnostic self-tests, or alter configuration parameters.
🚨 Emergency and Operational Safety
🔺 Loop Integrity: Because communication is superimposed via frequency shift keying (FSK) over the 4–20 mA loop without interrupting the process signal, standard control operations remain active during parameter adjustments. However, exercise caution when modifying live control parameters or forcing constant current outputs.
🔺 Battery Safety & Management: Replace all five AA batteries simultaneously when the low-voltage warning displays on the screen. Avoid mixing old and new batteries to prevent leakage or sudden unit shutdown during critical configuration tasks.
🔺 Storage Safety: Power down the unit immediately after use to trigger the automatic shut-off feature or conserve battery life. Store in a dry area free from extreme temperatures.
🔍 Troubleshooting and Common Issues
⚠️ Issue 1: Communication Error / “No Response” from Instrument
Troubleshooting Method: Verify that loop load resistance falls within the proper range (250 \Omega to 600 \Omega, including cable resistance). Check that cable clips have solid electrical contact with the signal terminals and verify loop wiring capacitance/inductance limits.
⚠️ Issue 2: Faded or Unresponsive LCD Screen
Troubleshooting Method: Adjust the display contrast settings via the software menu. If the screen remains blank or dim, check or replace the five AA alkaline batteries.
⚙️ Routine Maintenance and Care
🔹 Battery Compartment Checks: Periodically inspect the battery terminals for signs of corrosion or leakage, especially if the device is stored for extended periods between field maintenance tasks.
🔹 Environmental Care: Protect the membrane keypad and LCD screen from sharp objects, heavy impacts, chemical splashes, and prolonged exposure to direct sunlight or high heat.
🔹 Cable Inspection: Regularly check the supplied 1.1-meter communication cable and interchangeable clips (alligator/IC clips) for wire fraying, loose joints, or insulation damage.
💡 Frequently Asked Questions Q&A
❓ Q1: Can the BT200 communicate with non-Yokogawa instruments?
💬 A1: No. The BT200 utilizes Yokogawa’s proprietary BRAIN communication protocol and is optimized specifically for Yokogawa field instruments (such as DPharp, ADMAG, YEWFLO, and YTA series) and compatible signal conditioners.
❓ Q2: Does using the BT200 disrupt the live 4-20 mA process loop?
💬 A2: No. The terminal uses burst modulation to overlay communication signals onto the loop wiring without interrupting or altering the live 4–20 mA process control transmission.
❓ Q3: What is the difference between the BT200-N00 and printer variants?
💬 A3: The “-N00” suffix designates the base unit configuration shipped without an integrated thermal printer, resulting in a lighter, more compact handheld footprint (510g vs. 700g for printer versions).
