data sheet 256-channel armature relay multiplexer agilent E8462A ? 1-slot, c-size, register based ? high-density, low-cost multiplexer ? flexible reconfiguration ? armature non-latching relay channels ? contact protection for reliable operation ? three different easy-to-use terminal blocks available as options agilent E8462A description the agilent technologies E8462A high-density relay multiplexer is a c - size, 1- slot, register-based vxi module. this 256-channel multiplexer, using non-latching armature relays, offers a fast, reconfigurable, high point-count switching topology. this single-slot multiplexer extends the choices of multiplexers available to the system engineer. the E8462A can be programmed into individual topologies; some common examples are shown in the table below. many other combinations of these topologies are supported (in addition to those shown in the table). two-wire, three- wire, and four-wire measurements can be configured. refer to the agilent technologies website for instrument driver availability and downloading instructions, as well as for recent product updates, if applicable. common multiplexer configurations one 256 x 1 four 64 x 1 one 128 x 2 two 32 x 4 one 64 x 3 eight 32 x 1 ?? ?? ??
2 accessories a terminal block does not come with the module. three different terminal blocks are available as options: one for crimp-and-insert connectors, one for ribbon cable connectors, and the other for fault-tolerant protection of dut inputs, where each channel has a positive temperature coefficient resistor that behaves like a resettable fuse and will increase impedance when excessive current is flowing in a channel. one 2.5-in. analog bus cable (e1400-61605) is included to connect the analog buses of multiple slot-adjacent E8462A modules or a slot-adjacent e1411b multimeter module. the analog bus cable, easily installed at the faceplate of the component card, lets you connect the E8462A with the e1411b dmm. product specifications input note: these limits apply only if no connection is made to power mains. maximum input with opt. 012 terminal card with opt. 014 or opt. 015 terminal card analog bus maximum dc voltage: *250 v 60 v 60 v maximum acrms voltage: *250 v 50 v 30 v maximum acpeak voltage: 350 v 70.7 v 42 v maximum current per channel: switching: 2 a @ 30 v 100 ma n/a carry: 2 a 100 ma n/a *limited to 15,000 hours of voltage stress above 80 v. dc performance typical thermal offset per channel: 1-wire: 3 v 2-wire: 1.5 v typical closed channel resistance: 1-wire: < 0.9 * *with output protection resistor shorted; protection resistor adds 100 . ac performance bandwidth, 50 source/load configuration 100 protection resistor shorted 256 x 1: 6 mhz 128 x 1: 12.0 mhz 32 x 1: 30.0 mhz closed channel capacitance configuration to chassis to open channel 256 x 1: 620 pf 410 pf 128 x 1: 340 pf 220 pf 32 x 1: 160 pf 100 pf open channel to either open channel or to chassis (capacitance): 30 pf hi-to-low capacitance (2-wire-mode) configuration capacitance 128 x 2: 410 pf 64 x 2: 230 pf 16 x 2: 100 pf crosstalk configuration 10 khz 100 khz 1 mhz 10 mhz 256 x 1 (1-wire): 70 db 53 db 33 db 15 db 128 x 1 (2-wire): 85 db 65 db 45 db 30 db 16 x 1 (2-wire): 85 db 65 db 45 db 30 db general characteristics relays: armature relays open/close time: 5 ms max. minimum relay life: 1.0 v & 10 ma: 1 m operations rated full resistive load (60 va): 100 k operations power up/down state: all open minimum permissible load: 10 m vdc, 10 a
3 general specifications vxi characteristics vxi device type: register based, a16/d16 data transfer bus: a16, slave only size: c slots: 1 connectors: p1/p2 shared memory: none vxi buses: none instrument drivers - see the agilent technologies website (http://www.agilent.com/find/inst_drivers) for driver availability and downloading. command module firmware: downloadable command module firmware rev: a.08 i-scpi win 3.1: no i-scpi series 700: no c-scpi lynxos: no c-scpi series 700: no panel drivers: no vxi plug&play win framework: no vxi plug&play win 95/nt framework: yes vxi plug&play hp-ux framework: no module current i pm (a) i dm (a) +5 v: *1.0 *0.5 +12 v: 0.0 0.0 C12 v: 0.0 0.0 +24 v: C24 v: C5.2 v: C2 v: * specified in worst case typical mux configuration (eight 32x1). add 30 ma per addi- tional relay. cooling/slot watts/slot: 30 w max., 10 w typ. ? p mm h 2 o: 0.1 air flow liter/s: 3.0 ordering information description product no. 256-channel armature relay multiplexer* E8462A* crimp and insert connector terminal block** E8462A 012** fault tolerant terminal block E8462A 014*** ribbon cable connector terminal block E8462A 015*** service manual E8462A 0b3 notes: * standard unit does not include terminal block. one of the terminal block options must be ordered. ** crimp-and-insert contacts are not included. see the interconnect and wiring section for information on ordering crimp-and-insert contacts. *** ribbon cables and mating connectors are not included. see ordering details below: recommended 3m mating socket and cable part description qty required per terminal card 3m part number socket (without strain relief) 8 sockets either with or without strain relief 3414-6600 socket * (with strain relief) 8 sockets either with or without strain relief 3414-6606 metal strain relief *(low profile) 8 * 3448-2034 flat cable (34 conductor) length as needed 3365/34 * required only for socket with strain relief. manufacturer ordering information 3m electronic products division 6801 river place blvd. austin, tx 78726-9000 phone 800-225-5373
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