SS21-4G – 4G VoLTE Signaling & Gate Controller Module
Key Technical Features & Capabilities
- Cellular Network: 4G (Cat-1)/LTE communication (Bands: B1, B3, B5, B7, B8, B20) over VoLTE network.
- Independent Contact Inputs: 2 digital inputs with individual NO/NC contact triggering and persistence settings.
- Relay Remote Control: 1 NO relay output controlled via free phone call (caller ID recognition).
- User Notification: Voice alarm call and SMS notification to up to 4 destination phone numbers.
- Authorized Control List: Up to 8 phone numbers authorized for caller-ID relay activation.
- Automated Functions: Daily status test SMS generation and automatic SIM balance notification forwarding to the primary number.
- PC Diagnostics & Setup: Parameters and real-time operational logs managed via USB PC software interface.
Operating Principles
1. Alarm Signaling Mode
- Input Triggering: Activation via dry contact closure (NO) or opening (NC) tied to DC ground.
- Filter Interval: Configurable state-persistence filter (e.g., 0.3 sec) required before event generation.
- Event Dispatch: Sends user-defined SMS text and/or places voice alarm calls to checked phone numbers (1–4).
- System Diagnostics: Automatic forwarding of incoming carrier SMS (e.g., balance updates) and daily test reports to User 1.
2. Relay Remote Control Mode
- Control Method: Free phone call activation with caller ID verification.
- Access Verification: Rejects incoming calls from authorized list (Users 1–8) and triggers relay output.
- Switching Output: Monostable relay operation with parameterizable ON activation time (e.g., 5 seconds).
- Unauthorized Access: Unregistered caller IDs are rejected without relay activation.
Hardware Connections & LED Status
- USB Port: Mini-B connector for PC configuration.
- Antenna Connector: SMA port for 4G antenna attachment.
- SIM Holder: Slot for 4FF Nano-SIM card.
- REL Terminals: Relay switching contacts.
- IN1 / IN2 Terminals: Digital contact alarm inputs.
- +12V / COM Terminals: 10–30 V DC power supply input terminals.
| LED Indicator | Operational State |
|---|---|
| NET (Green) | Solid: Connected to cellular network |
| TRBL (Red) | System boot or trouble state |
| REC (Green) | Incoming call active |
| REL (Yellow) | Relay output active |
Package Contents
- 1x SS21-4G Signaling & controller module
- 1x 4G SMA antenna
- 1x USB 2.0 Mini-B cable
- 4x Plastic PCB spacer mounts
Frequently Asked Questions
Is external power required during USB PC configuration?
USB connection provides power for parameter programming. External 10–30V DC power supply connection is required to test cellular calls and relay switching operations.
What SIM card size is used, and how is the SIM PIN entered?
Requires a 4FF Nano-SIM card. If the SIM requires a PIN, it must be entered under General Settings in the PC setup software.
How does caller ID gate control function?
Up to 8 phone numbers can be registered. When an authorized number dials the module, the unit rejects the call without answering (free of charge) and energizes the relay for the set duration.
Who receives SIM balance and system test SMS reports?
Carrier network notifications (e.g., balance updates) and daily test SMS messages are sent exclusively to the primary registered phone number (Phone Number 1).
Can inputs IN1 and IN2 operate as Normally Closed (NC) contacts?
Yes. Each input can be independently configured as NO or NC with adjustable persistence filtering time.
How are configuration changes applied to the module?
Parameters edited in the PC software must be manually written to the module via the software upload button to update the internal memory.
SS21-4G user manual (en):