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Features
Ultra high-density multiplexing/scanning (1 x 576 2-wire channels in full rack mainframe)
Configure as 2- or 4-wire multiplexers under program control
Internal capacitive discharge relays keep high voltages from disturbing sensitive
measurement points
Supports thermocouple, RTD and thermistor measurements
Optional screw-terminal junction box includes built-in cold junction compensation
Direct routing to DMM through internal analog measurement bus simplifies field wiring
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EX1200-3096 Datasheet
96-Channel 100 V/1 A Two-Wire Multiplexer
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Overview
The EX1200-3096 high-density multiplexer is designed for scanning of multiple points
to a common bus, in either 2- or 4-wire configurations. The sequencing of switch
and measure operations can be tightly synchronized as part of the EX1200 embedded
scan list to minimize processor overhead and increase test throughput. Up to 576
two-wire (or 288 four-wire) channels can be accommodated in a single EX1200 full
rack mainframe for maximum density, or mixed and matched with other EX1200 plug-ins
for flexibility. All relays also have individual control, and each path allows for
hot switching of up to 100 Volts and 1 Amp (30 W dc max).
The EX1200-3096 consists of dual (1x48) 2-wire multiplexer banks. Each bank can
be interconnected within a module under program control (via bussing relays) and
across modules via the EX1200 analog bus to configure larger multiplexers as required.
This eliminates external wiring and helps reduce unterminated stubs.
Internal residual voltage discharge relays can be enabled to momentarily short out
the measurement path when changing from one input channel to the next. This dissipates
any voltage held by the wiring and instrument input capacitance. These relays protect
sensitive devices, such as CMOS circuits, from residual voltages caused by previous
high-voltage measurements. This feature can also be disabled in low-voltage applications
where maximum throughput speed is important.
An optional terminal block provides screw termination points for external field
wiring. This terminal block also includes cold junction compensation reference for
more precise temperature measurements.
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Specifications
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Channel Count
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(1 x 96) 2-wire, Dual (1 x 48) 2-wire, or (1 x 48) 4-wire
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Relay Type
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Electromechanical, Fail-safe
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Maximum Switching Voltage
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100 V AC, 100 V DC
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Maximum Switching Current
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1 A
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Maximum Switching Power
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30 W DC, 125 VA
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Path Resistance
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< 500 mΩ
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Insulation Resistance
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> 1x109 Ω
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Maximum Thermal Offset
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Per Channel (HI-LO)
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< 7 μV
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Capacitance
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Open Channel
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< 50 pF
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Channel-Mainframe
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< 20 pF
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High-Low
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< 50 pF
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Bandwidth (-3 dB)
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10 MHz typical
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Crosstalk
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1 MHz
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< -70 dB
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10 MHz
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< -50 dB
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Isolation
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1 MHz
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< -50 dB
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10 MHz
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< -35 dB
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Rated Switch Operations
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Mechanical
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1 x 107
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Electrical
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5 x 105 at full load
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Switching Time
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< 3ms
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Front Panel Connector
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200p HD SCSI Style
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Ordering Information
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EX1200-3096
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96 channel 2-wire, 100 V/ 1 A multiplexer
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27-0388-200
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200p mating connector
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41-0472-034 |
Strain relief bracket |
| 70-0367-004 |
EX1200-TB200, differential module |
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