The document describes the Web Controlled DIN Relay 4 by Digital Loggers, Inc., an industrial Ethernet-controlled relay designed for various applications.
Function Description
The DIN Relay 4 is a web-controlled industrial Ethernet relay that provides eight Single-Pole Double-Throw (SPDT) relay outputs. It allows for remote and local control of connected devices, offering features like power sequencing, automatic rebooting, and scripting capabilities. The device is designed for reliability and can be integrated into existing network infrastructures.
Important Technical Specifications
Relay Outputs:
- Type: 8 SPDT (Single-Pole Double-Throw) contacts.
- Terminals: Pluggable screw terminals.
- Recommended Current: 10A at 120VAC.
- Fusing: Relays are fused at 12A.
- Contact Material: Heavy silver-plated contacts for durability.
- Isolation: Fully isolated (1KV hipot tested) from the power supply.
- Contact Ratings (T-90 Relays):
- 240VAC: NO 40A, NC 30A
- 277VAC: NO 30A, NC 20A
- 30VDC: NO 20A, NC 10A
- 250VAC: NO 1HP, NC 1/2HP
- Approvals: RU and CE approved.
- Lifespan: Rated at 1 million mechanical operations, 250,000 electrical operations at 50% load, and 800,000 operations at 10% load. Relays are sealed.
- Internal Resistance: Typically 25m Ohms between terminals and relay contacts.
- Protection: Relay contacts are unprotected for maximum flexibility. For high current inductive switching, an external snubber circuit is recommended.
Power Input:
- Voltage: 12-28 VDC (switching power supply). Do not exceed 28VDC.
- Protection: An SCR crowbar shuts down the relay at 33V to protect it.
- Power Consumption:
- Maximum: 5W.
- Idle (all OFF): Approximately 2W.
- All ON: Approximately 5W.
- Undervoltage Lockout (UVLO): Approximately 10.2V with 1.5V hysteresis.
- Current Drain: Decreases with increasing input voltage due to a bucking regulator.
- Ambient Temperature: Should not exceed 150°F for maximum reliability.
- Noise Protection: External MOV or other protection device recommended across power input terminals in noisy environments.
Mounting:
- Standard 35mm DIN rail.
- Direct panel mounting: Use #6 screws on 5.8 x 3.9" centers.
Terminal Torque:
- Maximum 20in-lbs. Use stranded wire only.
Connectivity:
- Ethernet (RJ-45 cable).
- Optional WiFi via accessory hatch.
Sensor Port:
- RJ-12 jack for DHT11 or similar compatible sensors.
- Pin 2: +5V power out.
- Pin 3: Bidirectional TTL data bus.
- Other pins: Grounded.
Usage Features
Web Interface, Keypad, and LCD:
- Web Server: Accessible via any standard web browser using the device's IP address (default: 192.168.0.100).
- Local Control: Keypad and LCD for direct configuration and control.
- LCD Display: Shows status information like humidity and temperature (if sensor is connected), and Ethernet cable connection status.
- Reset Procedure: Gentle depression of the reset switch with a stylus allows selection of various reset modes (Clear lock bits, Reset Network and Scripting, Reset Network & Scripting + Enable WiFi, Complete wipe, Complete wipe + Enable WiFi).
IP Setup:
- Default IP: 192.168.0.100.
- Login: User:
admin (lowercase), Password: 1234.
- Direct Connection: Instructions provided for setting a compatible static IP (e.g., 192.168.0.50) on Windows (XP, 2000, 2003, Vista, 7, 8/10) and Max OS X for initial setup if the default IP is incompatible with the LAN.
Basic Operation:
- Power-Up Self-Test (POST): Performed upon initial power-up.
- DHCP/Static IP: Attempts to find a DHCP server; if none, defaults to the fixed IP set on the setup page.
- Web Access: Enter the IP address in a web browser to access the home page.
- Home Page Links:
- Relay Control: Manually switch relays on/off, "Cycle" devices (power off, wait, power on). Access masking allows individual relay control based on login.
- Settings: Administrator configuration page for relay names, power-on features, network settings, user information, and passwords.
- Help: Displays the latest online manual.
- Logout: Ends the authenticated session.
- Programmable Web Links: Four user-defined links for connecting to other power switches or remote sites.
Switch and Relay Names:
- Customizable names for the power relay itself and individual loads (e.g., "Machine Tool Controls," "Sump Pump").
Power Loss Recovery Modes:
- Three options for relay state after a power failure:
- All relays off until manually turned on.
- All relays automatically turn on using the "All ON sequence delay."
- Return to the same relay settings used prior to power loss, also using the "All ON sequence delay."
- Scripts starting on power-up can override these settings.
Sequenced "On Timer" (Power-On Sequence Delay):
- Programmable delay timer to switch relays on in sequence, preventing power surges and blown circuit breakers when multiple loads are switched on simultaneously. Typical delay: 60-120 seconds.
AutoPing Automatic Reboot:
- Monitors IP equipment and automatically reboots unresponsive devices by cycling power. More information available at Digital-Loggers.com/AutoPing2.html.
Scripting:
- Lua Scripting Language: Provides simple PLC functionality. Users can modify sample scripts or write their own. Resources available at www.lua.org and Digital-Loggers.com/Lua.html.
User Defined Links:
- Allows linking to other power relays, custom web pages, or remote websites by entering URLs and descriptions in the Setup page.
Confirm Option Checkbox:
- Enables a confirmation dialog box before accepting on/off changes.
Adding Users:
- Admin can add users and passwords. Each user can control specific relays using a masking matrix. Non-admin user web pages are scaled for mobile devices.
Network Settings:
- Fixed IP address, network mask, gateway, and subnet mask can be entered. A "protect" button locks these settings until the hardware reset button is pressed.
Security:
- Authentication: Secure challenge-response authentication.
- Encryption: HTTPS with a new encryption token for each transaction.
- Password Change: Recommended to change the default password.
- Subnet Restriction: Restricts access to only the 255 IP addresses on the local LAN ("Class C").
- HTTP Port Change: Changing the default HTTP port (80) to a non-standard value makes the relay harder to find.
- HTTPS: Recommended for security, but can be disabled by admin.
- Firewall Installation: Recommended to install the relay inside a firewall (using port forwarding) rather than directly on the Internet.
Maintenance Features
FLASH Firmware Upgrades:
- Firmware is upgradable via local hardwired Ethernet.
System Log & Notifications:
- System Activity Log: Accessible from the Setup page, reports major activity (login attempts, setting changes, relay state changes).
- Syslog Server Integration: Multiple relays and DLI power controllers can report to a centralized syslog server. Information at Digital-Loggers.com/Syslog.html.
- Email Reports: Can be triggered by certain events.
Contrast and Reset Controls:
- Reset Menus: Accessed by pressing the switch in the lower left corner with a stylus or pen.
- LCD Contrast Adjustment: Can be adjusted using a small Phillips screwdriver in the CNT hole for low ambient temperature or unusual viewing angles.
Sensor Replacement:
- DHT11 or compatible sensors connected to the sensor port should be replaced periodically under high humidity conditions.
Troubleshooting Resources:
- FAQ Page: Digital-Loggers.com/DIN4FAQS.html
- Spec Sheet: Digital-Loggers.com/DIN4spec.pdf
- RESTful API: Digital-Loggers.com/RestAPI.pdf for remote control from applications.
- Contact Protection Information: DINRelay.com/RelayCare.pdf for high current inductive switching.
Support and Feedback:
- Technical Support: (408) 330-5599.
- Email Suggestions: Engineering@Digital-Loggers.com.
- Product Registration: For free tech support and upgrades.
Warranty:
- One-year limited warranty covering major defects.
- Does not cover damage from excessive torque on screw terminals, exposure to water/moisture/vibration, overloading, or misuse.
- Requires original invoice and RMA number for service.
- Not designed, qualified, or intended for mobile, marine, airborne, medical, or aerospace use.
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