Campbell Scientific SDM-CD16D 16-Channel Digital Control Port Expansion Module - Manual (Page 6)

SDM-CD16D 16 Channel Digital Control Port Expansion Module
2. Control Specifications
2.1 General
Compatible dataloggers: CR800, CR850, CR1000, CR3000, CR5000,
CR10(X), CR23X, CR7 and 21X
Operating voltage: 12 VDC nominal (9 to 18 V)
Current drain at 12V DC: 100 µA typical (All ports HI, no load)
Total cable length: 6 m (CR10/10X, CR23X, 21X), 180 m (CR7)
2.2 Output Specifications
Output Voltage (no load): Output ON/HI, Nominal 5 V (Minimum 4.5 V)
Output OFF/LO, Nominal 0 V (Maximum 0.1 V)
Output Sink Current: Output will sink 8.6 mA from a 5 V source*
Output Source Current: Output will source 36 mA @ 3 V,
115 mA short-circuited to ground*
Max. Output Current: 400 mA at 50°C and 12 V supply (see NOTE below)
(total all outputs)
The maximum current should be derated under the following
conditions: 50 mA for every 10°C above 50°C and/or 50 mA for
every volt above 12 V. NOTE
Operating temp.: -25°C to +70°C standard
Size: 230 mm wide x 100 mm high x 24 mm deep
Weight: 350 g
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.
0.6V Drop
Output
Output
580R
Output set ON/HI Output set OFF/LO
510R 39R
V 5V, 0 Ω
FIGURE 2. Equivalent Output Driver Circuit
2