Agilent Technologies 34980A User's Guide download pdf (Page 21)

21

34952A multifunction module

with 32-bit DIO, 2-channel D/A

and totalizer

The multifunction module offers the flexibil-

ity you need for system control. The 34952A

has four 8-bit digital I/O channels, a 100-

kHz gated totalizer, and two ± 12 V analog

outputs—all on a single earth-referenced

module. The digital inputs and totalizer

input may be included in a scan list. Alarm

limits for the digital and totalizer inputs are

evaluated continuously, capturing and log-

ging alarm conditions even between scans.

Connections can be made via standard

50-pin Dsub cables or detachable terminal

block. The 34952T terminal block has a

pinout for connection to an external Opto

22 board.

Digital input/output characteristics

Four 8-bits channels, 8 bits wide, input or output,

non-isolated

Vin(L) <0.8V(TTL)

Vin(H) >2.0V(TTL)

Vout(L) <0.8V@Iout=-400mA

per output

Vout(H) >2.4V@Iout=1mA

Vin(H) max < 42 V with external open

drain pull-up

Alarm Maskable pattern match

or state change

Speed 4 ms (max) alarm sam-

pling

Latency 5ms(typical)to34980A

alarm output

Read/writespeed 95/s

Totalize input characteristics

Max count 2

26

- 1

Totalize input 100 kHz (max) rising or

falling edge,

programmable

Signal level 1 Vp-p (min) 42 Vpk (max)

Threshold 0VorTTL

Gateinput TTL-Hi,TTL-Lo,ornone

Countreset Manualorread+reset

Readspeed 85rds/s

Analog output characteristics

DAC 1, 2 ± 12 V, non-isolated

Resolution 1mV

IOUT 10 mA max

Settlingtime 1msto0.01%ofoutput

Accuracy ±(%ofoutput+mV)

 1year (0.25%+20mV)

Temp.coefficient ±(0.015%+1mV)/°C

Channel

006

Channel

005

16 Bits

32 Bits

Cnt H

Cnt L

Gate

Gate

DAC

1« 8

Totalizer

Channel

007

16 Bits

DAC

2« 8

Channel

004

8« %

DIO

bank

Channel

003

8« %

Channel

002

8« %

Channel

001

8« %

Bit0







Bit7

Bit8







Bit15

Bit16







Bit23

Bit24







Bit31

Figure 15. 34952A multifunction module

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 31 32

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