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USB DIO High Voltage and Relay

I/O Module Configuratio

USB-SSR08

Modules 1-4: Selectable with switch S1 in the CL position as either input or

output (default) modules. Switch settings for direction can be read back with

software. Do not mix input and output modules within this bank of four.

Modules 5-8: User-selectable with switch S1 in the CH position as either input

modules or output (default) modules. Switch settings for direction can be read

back with software. Do not mix input and output modules within this bank of

four.

USB-SSR24

Modules 1-8: Selectable with switch S1 in the A position as either input or

output (default) modules Switch settings for direction can be read back with

software. Do not mix input and output modules within this bank of eight.

Modules 9-16: Selectable with switch S1 in the B position as either input

modules or output (default) modules. Switch settings for direction can be read

back with software. Do not mix input and output modules within this bank of

eight.

Modules 17-20: Selectable with switch S1 in the CL position as either input or

output (default) modules. Switch settings for direction can be read back with

software. Do not mix input and output modules within this bank of four.

Modules 21-24: Selectable with switch S1 in the CH position as either input or

output (default) modules. Switch settings for direction can be read back with

software. Do not mix input and output modules within this bank of four.

I/O module logic polarity: Selectable with switch S2. Switch settings for polarity

can be read back with software. Default to non-inverted. For input modules,

invert mode returns a 1 when module is active; non-invert mode returns a

0 when module is active. For output modules, invert mode allows users to

write a 1 to activate the module; non-invert mode allows users to write a 0 to

activate the module.

Pull-up/pull-down on digital I/O lines: Configurable with switch S3 with 2.2 kΩ

resistor network. Switch settings for pull-up/pull-down selection can be read

back with software. Default to pull-up. Switch settings are applicable during

power up conditions of output modules only. Modules are active Low. When

switch to Pull-up, modules are inactive on power up. When switched to pull-

down, modules are active on power up.

Power

USB +5 V input voltage range: 4.75 V min to 5.25 V max

USB +5 V supply current (all modes of operation)

USB-SSR08: <100 mA

USB-SSR24: 10 mA max

External power supply (included; required for USB-SSR24): MCC p/n CB-PWR-9

9 V @ 1.67 A

Voltage supervisor limits - PWR LED

6.0 V > Vext or Vext > 12.5 V: PWR LED = Off (power fault)

6.0 V ≤ Vext < 12.5 V: PWR LED = On

USB-SSR24 Block Diagram

Bidiectional

Buffer

4

Bidiectional

Buffer

4

Bidiectional

Buffer

8

Bidiectional

Buffer

Load

8

USB

Microcontroller

500 mA

USB 2.0

Compliant

Interface

Power

Regulator

Power

Monitor

9.0 V

External

Power

Switch S1

(I/O Type)

Switch S3

(Pull-Up/Down)

Switch S2

(Inv/Non-Inv)

SSR Modules 1-8 (Port A)

SSR Modules 9-16 (Port B)

SSR Modules 17-20 (Port CL)

SSR Modules 21-24 (Port CH)

Specifications - USB-SSR Series