Remote Processing RPC-210 - Manual (Page 58)

TECHNICAL SPECIFICATIONS SECTION 16
Page 16-1
CPU
Analog Devices ADU C812 operating at 11.0592
M H Z
T E C H N I C A L SP E C I F IC A T I O N S SECT ION 16
Power Supply
Inputs: 5 ±0.25VD C or
6-16V
C u r r en t: 1 5 0 m a m a xi m um .
Outputs not loaded.
20 µA maximum, lowest power mode
Curr ents measured without RS-232 attached.
Screw terminals provided for + 5V and external
high voltage inp ut.
Memory
E x te r na l R A M -
512K
RAM is battery ba cked up. Backup time varies w ith
usage and o perating te mper ature. Backup time is
estimated at 4 to 6 years at 25°C, board not
powered. Backup time reduced by 50% when
o p er a ti ng a t 5 0 °C .
Program EPRO M -
512K, Atm el type 29C040A. This is a PEROM and
does not need sector er ase. Howe ver, data is
written in 256 byte blocks.
Analog Input
C h a nn e ls : 8
Resolution: 12 bits (about 1. 22 mV /coun t)
Range: 0. 1 - 5V (W11 installed) or 0.1 - 2. 5V (W11
removed).
I n pu t i m pe d an c e: 1 M o hm s
Conve rsion tim e: 1 m illi-second in Basic
Reference:
Adjustable from about 4.8 to 5. 2 volts or
preset to 2.5V
Analog Output
C h a nn e ls :
2
Resolution: 12 bits
Range: 0.1 - 5V (W 11 installed) or 0.1 - 2.5V
(W11 rem oved)
Output cur rent: 2 ma m aximum /chan nel, 4 ma total.
Response time: 2 ms
Real Time Clock
T y pe :
DS1689
A c cu r ac y : 1 min/month. This will vary
depending upon operating temperature.
Ac cu ra cy spe cif ied at 2 5°C
Interrupts: May g enerate an INT 0 when J7 -1 is
jumpered to J7-3. A lso used to wake
up card from low power mode.
Battery backup: Battery backs up RAM. Connector for
external battery provided when special
ordered without battery.
Operating life: Four to 6 years, depending upon
temperature and hum idity.
Reset
CPU resets when 5V supply falls below about 4. 65 volts.
Held in reset until supply rises to about 4.65 volts. Reset
time is about 300 ms.
LCD Display Port
Interfaces to 4 x 20 and 4 x 40 character displays.
Contrast adjustment provided.
Serial Ports
T y pe :
RS-232 (COM 0) and RS-232, RS-422, or RS-
485 (COM 1)
N u m be r : 2
MECHANICAL
Size: 7 2 . 24 m m x 1 5 7. 4 8 m m ( 2. 8 0 " x 6 . 2 0" )
Mounting: M o u nt in g ho le c en te r s a r e 3. 8 1 m m
(0.150") from each corner. Hole sizes are
4 . 4 4 5 m m ( 0. 1 7 5 " ) d ia . i n 6 . 3 5 m m
(0.250“ ) pad. Use 0. 250" standoffs for
mounting.
SHOCK AND VIBRATION
The RPC -210 board should withstand 5 g's r andom
vibration, 5 to 500 Hz if some m oderate amount of
precautions are taken.
U6 is plastic a nd has re latively low m ass. If vibration is
continuous, you can secure the chip to the socket using
silicone rub ber cem ent.
The batter y is soldere d to the boar d. H owever , in
continuous vibr ation envir onmen ts the welds co uld
break. Metal fatigue is possible in the bands connecting
the battery to the board. Pt a non-conductive piece