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The 3740 offers 28 general-purpose form C channels that are ideal for routing power or other control devices. For higher power applications of up to 7 A, four additional high current form A channels are provided.
If any general purpose signal requires routing to the Series 3700A mainframe backplane, terminal blocks are located on the card, which are enabled with jumpers. Custom configurations can be created with the user accessible terminal blocks. For additional protection, an onboard temperature sensor will notify the mainframe when the card’s operating temperature exceeds 70°C, compromising system specifications.
The 3740 uses two 50-pin male D-sub connectors for signal connections. For screw terminal connections, use the detachable 3740-ST accessory.
Key Features |
28 general purpose Form C relays rated for 300 V, 2 A switched or 3 A carry signal capacity; 60 Ω, 125 VA |
4 high current Form A relays rated for 250 VAC, 7 A or 30 VDC, 7 A switched capacity; 210 Ω |
Analog backplane connection relays provided for user interconnections |
Screw terminal connections provided on removable 3740-ST accessory |
Relay closures stored in onboard memory |
Latching electromechanical relays |
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 | |
3740 General Purpose Card with 32 Independent Channels | |
Accessories Available | |
Model Number | Description |
3721-MTC-1.5 | 50-pin D-sub Female to Male Cable, 1.5 m (5 ft.) |
3721-MTC-3 | 50-pin D-sub Female to Male Cable, 3 m (10 ft.) |
3740-ST | Screw Terminal Block |
3790-KIT50-R | 50-pin Female D-sub Connector Kit (contains 2 female D-sub connectors and 100 solder cup contacts) |