Document number: SPEC-3724A
Specifications are subject to change without notice.
DUAL 1 × 30 FET MULTIPLEXER CARD
60 differential channels, automatic CJC with 3724-ST
MULTIPLEXER CONFIGURATION: Two independent 1 × 30 2-pole Multiplexers. Banks can be connected together via relay creating a single 1 x 60 Multiplexer. Banks can be isolated from the backplane by relays. Card can be configured for 2 wire and 4 wire.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 78 pin male D-shells.
MODEL 3724-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with 0.062 inch O.D. 124 conductors maximum. 16 AWG maximum wire size with 0.092 inch O.D. 36 conductor per card maximum.
MAXIMUM SIGNAL LEVEL: 200 V DC or 141 V RMS between any terminal, 0.1A switched (0.1A carry), 800mW.
COMMON MODE VOLTAGE: 300 V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT : 107.
CONTACT LIFE:
Solid State > unlimited
EMR (Backplane) > 1×108 operations @ 5V, 10mA
1×105 operations @ maximum signal level
| Dual 1 × 301 | Single 1 × 601, 2 | ||
| Channel Resistance (HI and LOW Path) | <62Ω (54Ω@23ºC) | <64Ω (58Ω @23ºC) | |
| Contact Potential (differential) | <±2μV | <±2.5μV | |
| Offset Current | <10nA (<±[email protected]ºC/60% R.H.) | <10nA (<±[email protected]ºC/60% R.H.) | |
| Isolation | |||
| Differential | 109Ω, 500pF | 109Ω, 1100pF | |
| Bank-Bank | 109Ω, 100pF | — | |
| CH –CH | 109Ω, 125pF | 109Ω, 125pF | |
| Common mode | 109Ω, 150pF | 109Ω, 700pF | |
| Crosstalk CH-CH (50Ω Source, 50 Ω Load) 300KHz: 1MHz: |
−40 dB −30 dB |
−40 dB −30 dB |
|
| Bandwidth (50 Ω Source, 50 Ω Load) | 2MHz | 1MHz | |
1 Connections made using 3724-ST.
2 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.
GENERAL:
ACTUATION TIME: <0.2ms.
TEMPERATURE ACCURACY USING AUTOMATIC CJC WITH 3724-ST ACCESSORY: 1°C for J, K, T, and E type (see mainframe specification for details).
RELAY TYPE: Optically isolated FET.
RELAY DRIVE SCHEME: Direct.
INTERLOCK: Backplane relays disabled when interlock connection removed.
RELAY DRIVE CURRENT: 4mA.
OPERATING ENVIRONMENT:
Specified for 0°C to 50°C.
Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: −25°C to 65°C.
WEIGHT: 2.5lb.
FIRMWARE: Requires main revision to be 1.20 or above (applies to all 3706 series mainframes).
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
TYPICAL SCANNING SPEEDS, SWITCH ONLY3
| Ch/Sec | |
| Sequential scanning, single channel, Immediate Trigger Advance | > 1250 |
TYPICAL SCANNING SPEEDS, WITH MEASUREMENTS INTO MEMORY4
| Ch/Sec | |
| DCV (10V range) or 2W Ohms (1KΩ range) | >1000 |
| Thermocouple | >1000 |
| 3 or 4 Wire RTD | >450 |
| 4 Wire Ohms (1KΩ range) | >450 |
| ACV (10V, 400Hz range ) | >1000 |
3 Scanning script local to mainframe, within same bank, break before make.
4 3706 mainframe with autorange off, limits off, dmm.autodelay=0, dmm.autozero=0, 4½ digits (NPLC=.006), for ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off, dmm.opendetector=off. Scanning script local to mainframe, sequential scan within same bank (2 pole) or card (4 pole), and break before make switching.
Power Budget Information:
Quiescent Power (milliwatts): 1150
Channel Relay Power (milliwatts) each: 20
Backplane Relay Power Consumption (milliwatts) each: 100
See Chapter 8 of the series 3700 user’s manual for more detailed information.
ACCESSORIES AVAILABLE:
3791-KIT78-R 78 pin female D-sub connector kit (contains 2 female D-sub connectors and 156 solder cups).
3720-MTC-3 78 pin D-sub female to male cable, 3m.
3720-MTC-1.5 78 pin D-sub female to male cable, 1.5m.
3724-ST screw terminal block.
3791-CIT Contact insertion and extraction tool.
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SPEC-3724 July 2008