Keysight 34970A User Manual

25 | Keysight | 34970A Data Acquisition/Switch Unit Family - Technical Overview
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34907A
Multifunction Module
– 16 bits of digital input and output
– 100 kHz totalizer input
– Two ±12 V analog outputs
The Keysight 34907A allows great flexibility for a variety of sense
and control applications� It combines two 8-bit ports of digital
input and output, 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� Alarm limits
for the digital and event counter inputs are evaluated continuous-
ly, capturing and logging alarm conditions even between scans�
Digital input/ouput
Use the digital outputs with an external power supply to control
microwave switches and attenuators, solenoids, power relays,
indicators, and more� Use the digital inputs to sense limit switch
and digital bus status� There are no complex handshake modes;
reads and writes are initiated either from the front panel or the
bus�
Port 1, 2 8 bit, input or output, nonisolated
Vin(L) < 0�8 V (TTL)
Vin(H) > 2�0 V (TTL)
Vout(L) < 0�8 V @ Iout = –400 mA
Vout(H) > 2�4 V @ Iout = 1 mA
Vin(H) max < 42 V with external open drain pull-up
Alarming Maskable pattern match or state change
Speed 4 ms (max) alarm sampling
Latency 5 ms (typical) to 34970A alarm output
Read/write speed 95/s
Totalize input
Count events from devices like photo interrupters, limit switches,
and Hall-effect sensors�
It keeps an updated total which can be read via the front panel
or programmatically at any time� With 26 bits of resolution, it
can count events at full speed for nearly 11 minutes without an
overflow�
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, jumper selectable
Gate Input TTL-Hi, TTL-Lo, or none
Count reset Manual or Read + Reset
Read speed 85/s
Analog output
Use the two electronically calibrated analog outputs to source
bias voltages to your device under test, to control your analog
programmable power supplies, or use the outputs as setpoints
for your control systems� The outputs are programmed directly in
volts, either from the front panel or from the bus�
DAC 1, 2 ±12 V, nonisolated
Resolution 1 mV
IOUT 10 mA max
Settling time 1 ms to 0�01% of output
Accuracy ±(% of output + mV)
1 year ±5°C 0�25% + 20 mV
Temp� coefficient ±( 0�015% + 1 mV)/°C
Port 1
Channel 01
Port 2
Channel 02
Channel 03
Channel 04
Channel 05
Bit 0
Bit 7
8
Bit 0
Bit 7
16
8
26 Bits
+IN
-IN
Gate
Gate
DIO
TOT
DAC 1
16
DAC 2

Keysight 34970A Specifications

General

Maximum Voltage	300 V
Maximum Current	1 A
Relay Type	Electromechanical
Type	Data Acquisition/Switch Unit
Slots	3
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 300 V
AC Voltage Range	100 mV to 300 V
Resistance Range	100 Ω to 100 MΩ
Switch Type	Multiplexer, Matrix, General Purpose
Voltage Measurement Range	100 mV to 300 V
Temperature Measurement	Thermocouple, RTD, Thermistor
Switching Speed	60 channels/sec
DC Current Range	1 mA to 1 A
AC Current Range	1 mA to 1 A
Frequency Range	3 Hz to 300 kHz
Scan Rate	Up to 250 channels/sec
Current Measurement Range	1 µA to 1 A
Resistance Measurement Range	100 mΩ to 100 MΩ