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Series 8900SH Control Panel Operation And Installation Manual
Section 1 Introduction And Specifications
SERIES 8900SH SPECIFICATIONS:
Input Voltage
9.8 vac, 50/60 Hz, max input 35 vac with transient/surge protection
Avg. Power Consumption
3VA
Battery Protected Memory
8K RAM
CPU
Industry standard Z80, 4MHz
Time Clock
Internal crystal based clock
Operating System Memory
8K EPROM
Serial Interface
1200 Baud standard TTL signal level. Can be interfaced with modem
or direct connect to IBM compatible PC
Sensor Input Channels
Six
Sensor input Range
Voltage input of 1.9VDC is read at a value of –55 by the controller.
Voltage input of 3.1VDC is read as a value of 200. If an input is
shorted to common, the controller will read –40 at the input. If input
is open, the controller will read 230.
Sensor Accuracy
Within + or – 1 degree Fahrenheit
Sensor Type
Solid-state linear sensing
Output Channels
Up to 24
Output Capacity
30VA, 24VAC
Relay Type
Coil 12VDC / “Dry Contact”
All Other Components
5VDC
Wiring
Multiconductor 18 AWG thermostat wire is recommended to wire
sensor inputs and control outputs. Maximum length of wire from
control panel to sensor is 300 feet.
Batteries
Two 1.2V sealed nickel-cadmium rated at 720 hrs. Standard charge
15 hrs at 18mA.
Display
Light Emitting Diodes