Data Translation DT3010 Series, Getting Started Manual

Page: 58 / 142

Chapter 5
48
DT740 Screw Terminal Assignments
Screw terminals TB1 to TB56 on the DT740 screw terminal panel
correspond to the analog I/O channels from the DT3010, DT3010/32,
DT3010/32-268, and DT3016 boards. Screw terminals TB57 to TB112
on the DT740 screw terminal panel correspond to the digital I/O
signals from the DT3010, DT3010/32, DT3010/32-268, and DT3016
boards.
Screw terminals TB37 (+15 V) and TB39 (
−
15 V) on the DT740 screw
terminal panel are available for low-current signal conditioning
applications. The supply on the DT3010, DT3010/32, DT3010/32-268,
and DT3016 boards is current-limited through a 10
Ω
resistor and is
specified for a maximum load current of ±3 mA.
Screw terminal TB49 (+5.0 V reference) on the DT740 screw terminal
panel is also current-limited through a 10
Ω
resistor and is provided
for applications that require a reference less than 1 mA.
Screw terminal TB112 (+5 V output) on the DT740 screw terminal
panel is current-limited through a series 10
Ω
resistor and supports
loads up to 100 mA. Note that you must take the drop (current [I]
multiplied by resistance [R]) across the series 10
Ω
resistor (1 V at
100 mA) into consideration.
To provide maximum signal integrity, screw terminals TB35, TB36,
and TB51 to TB56 on the DT740 screw terminal panel have been
reserved for external shield connections from the J1 connector. Screw
terminals TB105 and TB108 on the DT740 screw terminal panel have
been reserved for external shield connections from the J2 connector.
In addition, multiple ground connections have been allocated for all
the digital and clock signals for proper shielding and current
capacity.