Specifications; I/O Module Configuration; Power; External Power Input - Measurement Computing USB-SSR08 User Manual

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

I/O module configuration

Parameter
Modules 1-4
Modules 5-8
Pull-up/pull-down on digital I/O lines
I/O module logic polarity

Power

Parameter
USB +5 V input voltage range.
USB +5 V supply current
External power supply (included)
Voltage supervisor limits - PWR LED
External power consumption

External power input

Parameter
External power input
Voltage supervisor limits - PWR LED
(Note 1)
External power adapter (included)
Table 1. I/O module configuration specifications
Specification
Selectable with switch S1 in the CL 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.
User-selectable with switch S1 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.
Configurable with switch S3 with 2.2 K ohm resistor network. Switch settings
for pull-up/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.
Selectable with switch S2. Switch settings for polarity can be read back via
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.
Table 2. Power specifications
Conditions
All modes of operation
MCC p/n CB-PWR-9
6.0 V > V > 12.5 V
ext
6.0 V < V < 12.5 V
ext
All modules off, 0 A downstream hub
power
All modules on, 100 mA downstream hub
power
Table 3. External power input specifications
Conditions
6.0 V > Vext or Vext > 12.5 V
6.0 V < Vext < 12.5 V
MCC p/n CB-PWR-9
17
Chapter 4
Specification
4.75 V min to 5.25 V max
<100 mA
9 V ± 10% @ 1.0 A
PWR LED = Off
(power fault)
PWR LED = On
180 mA typ, 220 mA max
300 mA typ, 360 mA max
Specification
+6.0 VDC to 12.5 VDC (9 VDC
power supply included)
PWR LED = Off (power fault)
PWR LED = On
+9 V ±10%, @ 1.0 A