Model USB-IIRO-16 is an ideal portable solution for adding easy-to-install isolated input and relay output digital I/O capabilities to any PC or embedded system with a USB port. Featuring 16 Form C (SPDT) electromechanical relays and 16 optically isolated digital inputs, the unit is the smallest of its kind for digital monitoring and control using USB.

The isolated, non-polarized inputs may be driven by either DC sources of 3-31 V (or higher by special order) or AC sources at frequencies of 40 Hz to 10KHZ. Optically isolating the digital inputs from each other, and from the computer, assures smooth, error-free data transmission in noisy, real-world environments. The input channels are available via a 34-pin IDC type vertical header. The relay outputs are de-energized at power-up to prevent an unintended control output signal. Data to the relays is latched. The relay contacts are available via a 50-pin IDC type vertical header.

The rugged industrial unit contains an internal, removable screw termination board (USB-STB-84) with onboard removable screw terminals to simplify wiring connections. The USB-STB-84 mounts directly into the vertical IDC connectors of the USB-IIRO-16 PCB. The USB-IIRO-16, like the PC/104 and PCI versions, is excellent in applications where on-board relays are required and inputs must be isolated such as in test equipment, instrumentation, and process control. The USB-IIRO-16 is a USB 2.0 device, offering the highest speed available with the USB bus. It is fully compatible with both USB 1.1 and USB 2.0 ports. The OEM version provides just the board without the enclosure and internal screw termination board and is ideal for a variety of embedded OEM applications.

USB-IIRO-16 Board	USB-STB-84 Installed	Terminals Wired	Ready to Go!

OEM USB/104 FORM FACTOR

What makes the OEM option unique is that its PCB size and mounting holes match the PC/104 form factor (without the bus connections). This allows our rugged digital board to be added to any PCI-104 or PC/104 stack by connecting it to a simple USB port usually included on-board with embedded CPU form factors such as EBX, EPIC, and PC/104 — especially important since many newer CPU chipsets do not support ISA and have plenty of USB ports. Future stacks will be using the extremely fast PCI Express bus which is essentially overkill for simple digital monitoring and control. The USB-IIRO-16 OEM board can also be added into many pre-existing standard PC/104 based systems and enclosures.

Applications

The industrial I/O market commonly uses electromechanical Form C relays due to their robustness and ability to withstand unexpected surge currents allowing for increased flexibility in switching capability. These relays are also used where small reed relays are inadequate due to their susceptibility to contact damage. The USB-IIRO-16 with its tiny enclosure and cable-less screw termination board provides portable connections to laptops for this kind of monitoring and control for the mobile test market. The full USB-IIRO-16 unit can be used in the following markets.

• Home
• Portable
• Laptop
• Education
• Laboratory
• Industrial Automation
• Embedded OEM

ACCESSORIES

The USB-IIRO-16 is available with optional cable assemblies, screw termination boards, an external AC/DC power supply, and DIN rail mounting provisions.

SOFTWARE

The USB-IIRO-16 is plug-and-play which allows quick connect or disconnect whenever you need additional I/O on your USB port. The module utilizes a high-speed custom function driver optimized for a maximum data throughput that is 50-100 times faster than the USB human interface device (HID) driver used by many competing products. This approach maximizes the full functionality of the hardware along with capitalizing the advantage of high-speed USB 2.0.
 

The USB-IIRO-16 is supported for use in most USB supported operating systems and includes a free Linux and Windows 98se/Me/2000/XP/2003 compatible software package. This package contains sample programs and source code in Visual Basic, Delphi, C Builder, and Visual C for Windows. Also incorporated is a graphical setup program in Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs. Embedded OS support include Windows Xpe.

Connector Pin Assignments

USB-IIRO-16-OEM has a 50-pin connector provided for Relay outputs and a 34-pin connector for the isolated inputs. Connector pin assignments are listed below.

‘Isolated Input’ Terminal Block PCB	Signal		‘Relay Output’ Terminal Block PCB	Signal
1	GND		1	Relay 7 - normally closed
2	GND		2	Relay 7 - common
3	PWR*		3	Relay 7 - normally open
4	PWR*		4	Relay 6 - normally closed
5	N/C		5	Relay 6 - common
6	N/C		6	Relay 6 - normally open
7	N/C		7	Relay 5 - normally closed
8	N/C		8	Relay 5 - common
9	N/C		9	Relay 5 - normally open
10	N/C		10	Relay 4 - normally closed
11	Isolated Input 7 B		11	Relay 4 - common
12	Isolated Input 7 A		12	Relay 4 - normally open
13	Isolated Input 6 B		13	N/C
14	Isolated Input 6 A		14	N/C
15	Isolated Input 5 B		15	Relay 3 - normally closed
16	Isolated Input 5 A		16	Relay 3 - common
17	Isolated Input 4 B		17	Relay 3 - normally open
18	Isolated Input 4 A		18	Relay 2 - normally closed
19	Isolated Input 3 B		19	Relay 2 - common
20	Isolated Input 3 A		20	Relay 2 - normally open
21	Isolated Input 2 B		21	Relay 1 - normally closed
22	Isolated Input 2 A		22	Relay 1 - common
23	Isolated Input 1 B		23	Relay 1 - normally open
24	Isolated Input 1 A		24	Relay 0 - normally closed
25	Isolated Input 0 B		25	Relay 0 - common
26	Isolated Input 0 A		26	Relay 0 - normally open

Isolated Inputs

• Number: Sixteen
• Type: Non-polarized, optically isolated from each other and from the computer (CMOS compatible)
• Voltage: 3 to 31 DC or AC RMS (40 to 1000 Hz)
• Isolation: 500V* (see manual) channel-to-ground and channel-to-channel
• Resistence: 1.8K ohms in series with opto-coupler
• Filter Response: Rise Time = 4.7 mS / Fall Time = 4.7 mS
• Non-Filter Response: Rise Time = 10 uS / Fall Time = 30 uS

Relay Outputs

• Number: Sixteen SPDT form C
• Contact Type: Single crossbar; Ag with Au clad
• AC Load: 0.5 A at 125 VAC (62.5 VA max.)
• DC Load: 1A at 24 VDC (30 W max.)
• Switching Voltage: 125 VAC, 60 VDC max.
• Switching Current: 1A max.
• Contact Resistance: 100 mOHM max
• Contact Life: mech’l: 5 million operations min.
• Operating Time: 5 msec max.
• Release Time: 5 msec max.

Environmental

• Operating Temperature Range: 0° to 70°C
• Storage Temperature Range: -40° to 85°C
• Humidity: Maximum 90% RH, without condensation
• Board Dimension: 3.550 x 3.775 inches
• Box Dimension: 4.00 x 4.00 x 1.4 inches

Power

• 5V@ 30mA typical (all relays off, add 30mA per relay)
• 5V@ 510mA typical (all relays ON)
• 5VDC provided via USB cable up to 500mA**

**optional external power supply can be ordered if relay use of the USB-IIRO-16 is expected to be greater than what can be supplied by the USB cable.

Regulatory Compliance

• This product is in full compliance with CE requirements.

 

Part Number	Price(USD)
USB-IIRO-16
USB-II16
USB-RO-16
USB-IIRO-8
USB-IIRO-4

 

When ordering RoHS products, please identify this need by using a unique model number suffix, "-RoHS" on all orders. For pricing and lead times, please contact your sales representative.

USB-IIRO-16 - Enclosure, module and screw terminal board
USB-II16 - 16 isolated digital inputs only version
USB-RO-16 - 16 relay outputs only version
USB-IIRO-8 - 8 isolated digital inputs and 8 relay outputs version
Accessories:
USB-STB-84	Internal plug-in screw termination board $79
USB-PWR	AC/DC adapter for external power $25
MP104-DIN	DIN rail mounting provision $19
Options:
-OEM	Board Only version (no enclosure or screw terminal board) - Call for pricing
-E	Economy model (no screw terminal board) - Call for pricing
-P	External power components and AC/DC adapter