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Introduction and Specifications
Specifications
1
1-31
Table 1-4. 2635A Specifications (cont)
General
Channel Capacity 21 Analog Inputs
4 Alarm Outputs
8 Digital I/O (Inputs/Outputs)
Measurement Speed
Slow rate:
Fast rate:
4 readings/second nominal
17 readings/second nominal
1.5 readings/second nominal for ACV and high-Ω inputs
For additional information, refer to Typical Scanning Rate and Maximum Autoranging Time.
Nonvolatile Memory Life >10 unpowered instrument years for 0°C to 28°C (32°F to 82.4°F).
>3 unpowered instrument years for 0°C to 50°C (32°F to 122°F).
>2 unpowered instrument years for 50°C to 70°C (122°F to 158°F).
Common Mode Voltage 300V dc or ac rms maximum from any analog input(channel) to earth
provided that channel to channel maximum voltage ratings are observed.
Voltage Ratings Channels 0, 1, and 11 are rated at 300V dc or ac rms maximum from a
channel terminal to earth and from a channel terminal to any other
channel terminal.
Channels 2 to 10 and 12 to 20 are rated at 150V dc or ac rms maximum
from a channel terminal to any other channel terminal within channels 2
to 10 and 12 to 20.
Size 9.3 cm high, 21.6 cm wide, 31.2 cm deep
(3.67 in high, 8.5 in wide, 12.28 in deep)
Weight Net, 2.95 kg (6.5 lbs)
Shipping, 4.0 kg (8.7 lbs)
Power 90 to 264V ac (no switching required), 50 and 60 Hz, 10 VA maximum 9V
dc to 16V dc, 10W maximum
If both sources are applied simultaneously, ac is used if it exceeds
approximately 8.3 times dc.
Automatic switchover occurs between ac and dc without interruption.(At
120V ac the equivalent dc voltage is ~14.5V.)
Standards Complies with IEC 1010, UL 1244 and CSA Bulletin 556B.
Complies with ANSI/ISA-S82.01-1988 and CSA C22.2 No. 231 when
common mode voltages and channel 0, 1, and 11 inputs are restricted to
250V dc or ac rms maximum.
Complies with VDE 0871B when shielded cables are used.
Complies with FCC-15B, at the Class A level when shielded cables are
used.
RS-232-C
Connector: 9 pin male (DB-9P)
Signals: TX, RX, DTR, DSR, RTS, CTS, GND
Modem Control: full duplex
Baud rates: 300, 600, 1200, 2400, 4800, 9600, 19200, AND 38400
Data format: 8 data bits, no parity bit, one stop bit, or
7 data bits, one parity bit (odd or even), one stop bit
Flow control: XON/XOFF (Software) and CTS (Hardware)
Echo: on/off