User's Manual
Table Of Contents
- SECTION 1 General Information
- SECTION 2 InterReach Unison System Description
- SECTION 3 Unison Main Hub
- SECTION 4 Unison Expansion Hub
- SECTION 5 Unison Remote Access Unit
- SECTION 6 Designing a Unison Solution
- SECTION 7 Installing Unison
- 7.1 Installation Requirements
- 7.2 Safety Precautions
- 7.3 Preparing for System Installation
- 7.4 Unison Component Installation Procedures
- 7.5 Splicing Fiber Optic Cable
- 7.6 Interfacing a Main Hub to a Base Station or a Roof-top Antenna
- 7.7 Connecting Contact Alarms to a Unison System
- 7.8 Alarm Monitoring Connectivity Options
- SECTION 8 Replacing Unison Components
- SECTION 9 Maintenance, Troubleshooting, and Technical Assistance
- APPENDIX A Cables and Connectors
- APPENDIX B Compliance
- APPENDIX C Changes and New Capabilities
- APPENDIX D Glossary
Connecting Contact Alarms to a Unison System
7-48 InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL D-620003-0-20 Rev J
• The micro controller sees a high or 5V for an open condition. The loop resistance
must be greater then 20K Ohm to guarantee the micro sees 3.5V or greater.
• The micro controller sees low or 0V for a closed condition. The loop resistance
must be greater than 2K Ohm to guarantee the micro sees 1V or less.
• You may have to determine a time on and off for the connection so that the alarm
is not intermittent.
• Firmware has a five second hysteresis to ensure the micro does not capture inter-
mittent contact closures.
Table 7-12 Output Electrical Characteristics
I max is 5V/10K = 500uA. +/- uA due to R and V tolerances.
Vmax is 5V+5% from power supply spec.
Parameter Description Specification
I Max Continuous Load Current 550uA
V Max DC volts out 5 V + 5%
T on Max Max Turn-on Time 5 Seconds
T off Max Max Turn-Off Time 5 Seconds