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Model T940 User Manual
Publication No. 980938 Rev. K
UR14 Driver/Receiver Board I-22
Astronics Test Systems
Description
Characteristics
AUX Channels
6 SE Driver/Receivers per VXI slot
Per channel relay isolation
(2 are dedicated to the External Probe when used)
Output Voltage Ranges*
(Selectable/Sequencer)
-15 V to +17 V (VM0)
-7 V to +24 V (VM1)
Output Voltage Swing
500 mV
1
to 24 V
Output Resolution
< 5 mV
Output Accuracy
± (50mV + 1% of PV) Slow, Default, Medium slew
settings
± (75mV + 1% of PV) Fast slew setting
Output Drive Current
± 65 mA typical (Source/Sink)
± 85 mA Max (Source/Sink)
Output Impedance
(Selectable/Channel)
12 Ω or 50 Ω ± 4 Ω
Slew Rate
(Selectable/Channel or
custom)
0.25 V/ns
0.7 V/ns, 1.0 V/ns or 1.3 V/ns:typical
Input Threshold Ranges
-14.75 V to +14 V (VM0)
-6.75 V to +21 V (VM1)
Input Threshold Resolution
< 5 mV
Input Threshold Accuracy
± (50mV + 1% of PV)
Current Source/Sink
(Programmable/Channel)
Range: ±0.4 mA to ±20 mA (usable to 24 mA)
Resolution: < 10 μA
Accuracy: 3% of PV + 120uA
Commutating Voltage: V
com
(CMH and CML)
Range: same as driver
Resolution: < 5 mV
Accuracy:
± (50mV + 1% of PV)
Over Current Alarm (IAH and
IAL)
Range: ±800 mA
Resolution: < 30
μA
Accuracy: ± (50mA + 1% of PV)
Resistive Loads
(Selectable/Channel)
140 Ω to ~1 KΩ (8 selections) to Vcom
Accuracy: 30%
DUT_GND Reference Input
Offset range: ±3 V
Interrupt Voltage: 390 mV ±50 mV
Resistive load: 100 K ±2%
Bypass Relay: On or Off
Pin Electronics Power Input
Supplied by the power converter board.
UR14: Channel Over-voltage
Protection
Clamped to 0.4 V beyond V+ or V-
•
Max current 200mA for < 10ms
Auto Shutdown:
•
DC level within 1 V of V+ or V-
•
A 5 µs spike exceeding V+ or V-
Pin Electronics Monitoring
(per channel)
All programmed levels
Output and Input levels
Temperature