Measurement-computing SC-1608 Series Uživatelský manuál Strana 27

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SC-1608 Series User's Guide Specifications
27
Power
Table 5. Power specifications
Parameter
Condition
Specification
External power input
connectors (Note 7)
J1: barrel type
J2: 2-pole terminal block, (16 AWG to 30 AWG)
External power input voltage
range (Note 8)
12V, ±5%
External power supply current
25 mA typical (Note 9)
1700 mA max, including all external loading
External power supply
(included)
MCC p/n PS-12V30WEPS
+12 V DC, 30 Watt, 5% regulation
+VO output voltage range
User I/O connector J35, pin 29
4.50 V min to 5.25 V max
+VO output current
10 mA max
Power LED
3V < V
ext
< 15 V: LED is ON
V
ext
> 15 V: LED OFF (power fault)
Power ON sequence (Note 10)
Arbitrary; either the SCC-8-8-2 or the OEM DAQ
board can be powered on first.
Note 7: The SCC-8-8-2 can be powered from either of the external power connectors J1 or J2. Do not
attempt to apply power to both external power connectors simultaneously.
Note 8: This specification applies to the actual voltage level present at the input to the external power
connector (J1 or J2) of the SCC-8-8-2, as any significant loading of the external power supply will
cause a voltage drop across the power supply cable.
Note 9: This is the total quiescent current requirement for the device, and does not include any potential
loading of the 8B modules, SSR modules, digital I/O bits, or +VO terminal.
Note 10: To prevent digital inputs from floating, both the SCC-8-8-2 and the OEM DAQ board should be
powered off while they are being assembled together.
Note 11: When using a USB-1608G-OEM-Series board, the total current available for 8B analog I/O modules
and SSR digital I/O modules is 1612 mA, maximum.
When using the E-1608-OEM, the total current available for 8B analog I/O modules and SSR digital
I/O modules is 1292 mA, maximum. For example, this current limitation would restrict the number
of 8B38 strain gage modules that can be installed on the SC-1608-2AO-ENET to six (when SSR
modules are installed), or seven (when no SSR modules are installed). Refer to the SC-1608 Series
User's Guide for details.
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