Sensaphone 2800 - Manual (Page 169)

Appendix E: Technical Specifications
167
APPENDIX E: 2800 Technical Specifications
Hard-Wired Environmental Inputs
Number of Zones: 4
Zone Connector: terminal block
Zone Types: N.O./N.C. contact, 2.8K (-109° to 115° F; -85° to
57° C), and 10K thermistor (-87° to 168° F; -66° to 76° C), and
4–20mA (-10,000 to 10,000)
Zone characteristics: 28K
Ω to 2.85V (temperature/contact) or
250 Ohms to ground (4–20mA)
A/D Converter Resolution: 10 bits ±2 LSB
Zone Protection: Metal oxide varistors, and fast-acting diode
clamps
Wireless Environmental Inputs
Number of Sensors: 4
Operating Frequency: ISM 2.4 GHz
Receiver Sensitivity: -100dBm
Transmit Power Output: 60mW
Microphone
Internal: for recording custom voice messages
External (optional): For listening in to on-site sounds and high
sound level alarms
• Mic Connector: terminal block
• Mic Type: Electret Condenser
• Mic Impedance: 2.2K Ω