SDM-CD16D 16 Channel Digital Control Port Expansion Module
2
2.2 Output Specifications
Output Voltage (no load):
Output ON/HI, Nominal 5V (Minimum 4.5V)
Output OFF/LO, Nominal 0V (Maximum 0.1V)
Output Sink Current:
Output will sink 8.6mA from a 5V source*
Output Source Current:
Output will source 36mA @ 3V,
115mA short-circuited to ground*
Max. Output Current:
400mA at 50°C and 12V supply (see NOTE below)
(total all outputs)
The maximum current should be derated under the following
conditions:
50mA for every 10°C above 50°C and/or 50mA for every volt
above 12V.
Operating temp.:
-25
°
C to +70
°
C standard
Size:
230mm wide x 100mm high x 24mm deep
Weight:
350g
EMC Status:
Complies with EN55022-1:1998 and
EN50082-1:1998
* If more detailed output characteristics are required, experienced users should consult the
equivalent circuit diagrams shown in Figure 2, below.
Figure 2 Equivalent Output Driver Circuit
3. Power Considerations
The SDM-CD16D power requirements are large compared to most Campbell
Scientific products when driving significant loads. For many applications an
external power supply, as shown in Figure 3, is recommended to power the
SDM-CD16D.
For some applications it may be convenient to use the datalogger supply to power
the SDM-CD16D, as shown in Figure 3. For long-term applications, the lead-acid
power supply available with Campbell Scientific dataloggers should be used,
allowing the batteries to be float charged. Alkaline batteries are
not
recommended
for long term applications.
NOTE
0.6V Drop
Output
Output
580R
Output set ON/HI
Output set OFF/LO
510R
39R
V
5V, 0
Ω
