|
Features
High-density solid-state multiplexer, up to 288 2-wire channels per full rack mainframe
On/off switching < 500 μs
Configure as 2 or 4-wire multiplexers
Optically isolated design
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
|
|
EX1200-3048S Datasheet
48 Channel FET Multiplexer
|
Overview
The EX1200-3048S is a high-density FET multiplexer module designed for scanning of multiple points to a common bus, in either 2- or 4-wire configurations, either synchronously with the EX1200 system DMM scan function, or asynchronously as a system switch to other devices through LXI LAN messages or the hardware trigger bus. The solid-state design delivers maximum switching speed and near infinite life. Up to 288 two-wire (or 144 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. Typical applications include temperature and voltage data acquisition and datalogging at up to 1000 scans per second.
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.
|
|
Specifications
|
|
Channel Count |
48 two-wire or 24 four-wire |
|
Relay Type |
Opto-isolated solid-state |
|
Maximum Switching Voltage |
250 V |
|
Maximum Switching Current |
0.2 A |
|
Path Resistance |
< 8 Ω |
|
Insulation Resistance |
> 1x109 Ω |
|
Maximum Thermal Offset |
|
|
Per Channel (HI-LO) |
< 7 μV |
| Capacitance |
|
| Open Channel |
< 50 pF |
| Channel-Mainframe |
< 20 pF |
| High-Low |
< 50 pF |
| Bandwidth (-3 dB) |
10 MHz typical |
| Crosstalk |
|
| 100 kHz |
< -55 dB |
| 1 MHz |
< -45 dB |
| 10 MHz |
< -30 dB |
| Isolation |
|
| 100 kHz |
< -55 dB |
| 1 MHz |
< -40 dB |
| 10 MHz |
< -25 dB |
| Rated Switch Operations |
|
| Mechanical |
1 x 107 |
| Electrical |
5 x 105 at full load |
| Switching Time |
< 500 us |
| Front Panel Connector |
104p HD Dsub |
|
|
Ordering Information
|
|
EX1200-3048S |
48 channel 2-wire FET multiplexer |
| 27-0389-104 |
104-pin HD D-sub mating connector with hood and pins, fixed contacts (no crimp tool required) |
| 27-0390-104 |
104-pin HD D-sub mating connector, backshell and pins, crimp style |
| 70-0297-001 |
Crimp tooling, includes handle and positioner, 22 AWG |
| 70-0363-501 |
104-pin HD D-sub mating connector and backshell, with 3 ft unterminated 22 AWG wire |
| 70-0367-001 |
EX1200-TB104, differential module |
|
|
|
