Remote Processing CX-10 - Manual (Page 34)

TECHNICAL SPECIFICATIONS SECTION 9
Page 16-1
CPU
Atmel AT80C51RE2
TECHNICAL SPECIFICATIONS SECTION 9
Power Supply
Inputs: 12V minimum at “battery”. 0-25V at
External power with 12V battery.
Current draw: 70 ma nominal, no RS-232 devices
attached..
No relays on. Each relay draws 45 milli-
amps when energized
No opto inputs on. When LED is
illuminated, board current draw is increased
10 milli-amperes/LED
No RF modem installed (or is powered off)
Current draw, all relays on: 0.5 amps maximum
Battery charger: Temperature compensated for 12V
lead acid.
Voltage monitoring: Battery level may be checked
through register 9. A number between 0 and 4095 is
returned. Multiply this number by 0.007326 to
obtain voltage. Charge level is read through register
8. A number between 0 and 4095 is returned.
Multiply this number by 0.007326 to obtain voltage.
Maximum charging current: 1A (depends upon
ambient current)
Memory
2K byte EEPROM (Atmel AT25160)
Larger serial EEPROMs may be installed but extra
capacity is not recognized or used. OS
automatically initializes EEPROM at first use.
Maximum writes: 1,000,000
Maximum reads: unlimited
Storage life: 10+ years.
Relays
Number: 8
Configuration: normally open. Relays are
connected in groups. Each group has its own
common power line.
Rating (resistive load): 125VAC @ 3A
32VDC @ 3A
Minimum load: 10 milli-amps.
Transient absorbers: none USER TO ADD.
Opto Buffered inputs
Number: 8
Voltage range: 0-16 volts DC. 5 volts minimum to
consider an input “ON”
Maximum frequency: 3000Hz (for pulse counting)
Serial Ports
Type:
RS-232 (COM 0) and RS-232 or RS-485 (COM
3)
COM 3 may be used in modbus or ASCII mode.
ASCII mode sends and receives characters
without any protocol.
Number of ports:2
RF Modem (optional)
Type: Digi International XT09 series
Frequency: 900 Mhz, spread spectrum
Power: 5V, 70 mA idle on, 0.65A transmitting
(0.5W)