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The 3724 provides two independent banks of solidstate relays arranged as 1×30 two-pole multiplexers that are ideal for high reliability, high speed multipoint measurement applications including temperature. The two banks can automatically be connected to the Series 3700A mainframe backplane and optional DMM through the analog backplane connection relays. This connection allows the mainframe to reconfigure the card to a single 1×60 two-pole multiplexer or to enable card-to-card expansion for even larger configurations.
The solid-state FET relay technology supports fast switching times with scanning rates of greater than 1250 channels/second and provides unlimited contact life. In addition, the 3724 supports thermocouple temperature measurements when used with the 3724-ST (screw terminal) accessory providing automatic cold junction compensation (CJC).
The 3724 uses two 78-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC, use the detachable 3724-ST accessory.
Key Features |
60 two-pole or 30 four-pole solid-state channels |
Scanning speeds greater than 1250 channels/second (switch only) |
Optically isolated, solid-state FET relays provide unlimited contact life |
200 V, 0.1 A switch/carry signal capacity; 800 mW |
Automatic CJC for temperature measurements when used with 3724-ST accessory |
Analog backplane connection relays provide easy bank and card interconnections |
Screw terminal connections provided with removable 3724-ST accessory |
Ideal for maintenance-free, long-life thermocouple temperature measurements |
Specifications | |
Series 3700A System Switch/Multimeter and Plug-In Cards | |
Model Overview | |
Model | Description |
Mainframes | |
3706A | Six-Slot System Switch with High Performance DMM |
3706A-NFP | Six-Slot System Switch with High Performance DMM, Without front panel display and keypad |
3706A-S | Six-Slot System Switch |
3706A-SNFP | Six-Slot System Switch Without front panel display and keypad |
Plug-in Cards | Description |
3720 | Dual 1×30 Multiplexer Card (Auto CJC when used with 3720-ST) |
3721 | Dual 1×20 Multiplexer Card (Auto CJC when used with 3721-ST) |
3722 | Dual 1×48, High Density, Multiplexer Card |
3723 | Dual 1×30, High Speed, Reed Relay Multiplexer Card |
3724 | Dual 1×30 FET Multiplexer Card |
3730 | 6×16, High Density, Matrix Card |
3731 | 6×16 High Speed, Reed Relay Matrix Card |
3732 | Quad 4×28, Ultra-High Density, Reed Relay Matrix Card |
3740 | 32 Channel Isolated Switch Card |
3750 | Multifunction Control Card |
3760 | 10-Channel High Current Multiplexer Card |
3761 | 10-Channel Low Current Multiplexer Card |
3762 | 10-Channel High Voltage Multiplexer Card |
3765 | Hall Effect Card |
Specifications | ||||||
Plug-in Cards for; Series 3700A Mainframes | ||||||
Model Overview | ||||||
Model | Channels | Card Configuration | Type of Relay | Contact Configuration | Max. Voltage | Max. Current Switched |
3720 | 60 (Dual 1×30) | Multiplexer | Latching electro mechanical | 2 Form A | 300 V | 1 A |
3721 | 40 (Dual 1×20) | Multiplexer | Latching electro mechanical | 2 Form A | 300 V (ch 1–40) 60 V (ch 41–42) | 2 A (ch 1–40) 3 A (ch 41–42) |
3722 | 96 (Dual 1×48) | Multiplexer | Latching electro mechanical | 2 Form A | 300 V | 1 A |
3723 | 60 (Dual 1×30) or 120 single-pole (Dual 1×60) | Multiplexer | Dry reed | 1 Form A | 200 V | 1 A |
3724 | 60 (Dual 1×30) | Multiplexer | FET solid-state | 2 Form A | 200 V | 0.1 A |
3730 | 6×16 | Matrix | Latching electro mechanical | 2 Form A | 300 V | 1 A |
3731 | 6×16 | Matrix | Dry reed | 2 Form A | 200 V | 1 A |
3732 | 448 crosspoints (Quad 4×28) | Matrix | Dry reed | 1 Form A | 200 V | 0.75 A |
3740 | 32 | Independent | Latching electro mechanical | 28 Form C 4 Form A | 300 VDC/250 VAC (Form A) | 2 A (Form C) 7 A (Form A) |
3750 | 40 digital I/O 4 counter/totalizers 2 isolated analog outputs | Independent | N/A | N/A | N/A | N/A |
3760 | 10 | Multiplexer | Non latching electro mechanical | 2 Form C | 500 V | 5 A |
3761 | 10 | Multiplexer | Dry reed | Form A | 30 V | 100 mA |
3762 | 10 | Multiplexer | Dry reed | 2 Form A | 1000 V | 0.5 A |
3765 | 4×5 | Matrix | Non latching electro mechanical and Dry reed | Form A | 8 V | 100 mA |
Specifications | |
Plug-in Cards for; Series 3700A Mainframes | |
Series Overview | |
Model | Comments |
3720 | 2 independent 1×30 multiplexers. Automatic temperature reference when used with screw terminal accessory (3720-ST) |
3721 | 2 independent 1×20 multiplexers. Automatic temperature reference when used with screw terminal accessory (3721-ST) |
3722 | 2 independent 1×48 multiplexers |
3723 | 2 independent 1×30 multiplexers |
3724 | 2 independent 1×30 multiplexers. Automatic temperature reference when used with screw terminal accessory (3724-ST) |
3730 | Columns can be expanded through the backplane or isolated by relays |
3731 | Relay actuation time of 0.5 ms. Columns can be expanded through the backplane or isolated by relays |
3732 | Banks can be connected together via bank configuration relays to create a single 4×112 or dual 4×56 matrix. Analog backplane relays also included for card-to-card expansion. Row expansion with 3732-ST-R accessory to create a dual 8×28 or single 16×28 matrix. |
3740 | 32 general purpose independent channels. |
3750 | All-in-one card design. 40 bidirectional I/O. Four 32- bit counter/totalizers. 2 programmable analog (V or I) outputs. |
3760 | Single 1×10 high current multiplexer |
3761 | Single 1×10 low current multiplexer |
3762 | Single 1×10 high voltage multiplexer |
3765 | Specialty 4×5 matrix for Hall Effect and van der Pauw measurements. |
Specifications | |
3724 Dual 1×30 FET Multiplexer Card | |
Accessories Available | |
Model Number | Description |
3720-MTC-1.5 | 78-pin D-sub Female to Male Cable, 1.5 m (5 ft.) |
3720-MTC-3 | 78-pin D-sub Female to Male Cable, 3 m (10 ft.) |
3724-ST | Screw Terminal Block (required for auto CJC thermocouple measurements) |
3791-CIT | Contact Insertion and Extraction Tool |
3791-KIT78-R | 78-pin Female D-sub Connector Kit (contains 2 female D-sub connectors and 156 solder-cup contacts) |