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ROB-24 - Relay Output Card, 24

Acces I/O



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Product Datasheet

This product is RoHS-compliant

Please contact us if you require a non-RoHS version.

Please note, Acces I/O products are often available in an array of different options, of which only a selection will be displayed here. Please contact us for pricing if you require a product option that is not shown on our website.

Model ROB-24 is a 24-channel relay-output cards that can be controlled by digital inputs from ACCES IOD-Series digital I/O cards or other manufacturer's digital output cards. The card can be powered by either +5 VDC (ROB-24 or ROB-24H) or by 125 VAC (ROB-24-1 or ROB-24H-1). In the former case, we can also supply a seven-foot cable, CAB-MLX, that mates with standard molex connectors used in personal computer power distribution. For operation from AC-power inputs, the "-1" versions of these cards, screw terminals for the AC-power input and a power transformer are included. The cards also contain 24 LED's, one associated with each relay. These illuminate when their associated relays actuate.

For remote (RS-485) control of relays, you can also connect a modified ROB-24 to our RDG-24.

Each relay provides normally-closed and normally-open contacts (SPDT). If you need dual Form C contacts (DPDT), you may specify ROB-24-2 or ROB-24H-2.

I/O connectors for 50-pin connections (from ACCES' IOD-Series cards) and 37-pin connectors are provided. The latter provide means to use these relay cards with other manufacturer's cards if they use 37-pin connections. Interconnection to the digital output card can be via ACCES' model CAB50F-xx ribbon cable to ACCES' I/O cards or via CAB37-xx ribbon cable to other I/O cards. The relays are actuated by a 5-volt logic signal applied to appropriate pins of either the 50-pin or the 37-pin connector. If the digital-output card to be used has an unbuffered output (e.g., direct output from a type 8255 Programmable Peripheral Interface chip), then specify ROB-24-3 or ROB-24H-3. (Note: When Option 3 is selected, the relays will be actuated when power is applied to the card.) Thus, by use of ROB-24 or ROB-24H, you can realize simple, inexpensive control of heaters, fans, lights, etc.

The ROB-24 may be interfaced to any port of any ACCES IOD-Series card. Normally, digital inputs are pulled down to ground through 680 ohm resistors. However, if you prefer that they be pulled up to +5VDC, you can specify ROB-24-5 or ROB-24H-5. You can have multiple options in the card. For example, if you need AC-powered capability, DPDT relay output connections, and signals will come from an unbuffered digital output card, then the model number becomes: ROB-24-1-2-3