Description
The Edwards 3-RS232 ancillary communications card is a serial interface module that allows connection of control panels to external devices. It supports two optically-isolated RS-232 circuits and is designed for integration with printers, modems, and command equipment.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Edwards |
| Category |
Computer |
| Part Number |
3-RS232 |
| Subcategory |
Communication Card |
| Voltage |
24 VDC |
| Current (Standby) |
58 mA at 24 VDC |
| Current (Alarm) |
58 mA at 24 VDC |
| Circuit Configuration |
Class B |
| Circuit Type |
RS-232 serial, two optically-isolated circuits |
| Data Rate |
300 to 38,400 baud (selectable) |
| Max Circuit Length |
50 ft (15.2 m) |
| Minimum Wire Size |
18 AWG (0.75 mm²) |
| Operating Temperature |
32 to 120°F (0 to 49°C) |
| Relative Humidity |
0 to 93% noncondensing |
| Typical Applications |
Printers, modems, external control equipment |
| Weight |
0.30 lbs |
Information About 3-RS232
The 3-RS232 is an ancillary communication card engineered for Edwards fire alarm and control systems, enabling RS-232 serial communication. This card provides two independent, optically-isolated ports, allowing reliable interfacing with external devices without risk of feedback interference. It is suitable for Class B configurations and supports a wide range of baud rates for flexible system applications. Designed for dependable panel connectivity, the 3-RS232 operates under normal fire system environmental conditions and integrates seamlessly into Edwards architectures.
Key Features:
- Dual RS-232 Ports: Two optically-isolated serial circuits for external device integration.
- Baud Rate Flexibility: Supports multiple data rates up to 38,400 baud for diverse applications.
- Class B Configuration: Built to operate within Edwards Class B circuit standards.
- Environmental Tolerance: Functions in 32–120°F with up to 93% relative humidity.
- Compact Design: Lightweight board allows easy installation inside control panels.
- Extended Compatibility: Connects to printers, modems, and control equipment.
- Standard Wiring: Requires 18 AWG (0.75 mm²) minimum cabling for reliable operation.
The 3-RS232 delivers the reliability and precision required for serial communications in Edwards control systems.
