XC2 Hardware Manual
Chapter 3: -EB1 I/O Option Board
3.5. Digital Outputs [-EB1]
Optically-isolated solid-state relays drive the digital outputs. You can connect the digital outputs in current
sourcing or current sinking mode but you must connect all four outputs in a port in the same configuration.
Refer to
and
The digital outputs are not designed for high-voltage isolation applications and they should only be used with
ground-referenced circuits.
You must install suppression diodes on digital outputs that drive relays or other inductive devices. To see an
example of a current sourcing output that has diode suppression, refer to
. To see an example of a
current sinking output that has diode suppression, refer to
NOTE:
The digital outputs have overload protection. They will resume normal operation when the overload
is removed.
Table 3-16:
Digital Output Specifications [-EB1]
Digital Output Specifications
Value
Maximum Voltage
24 V (26 V Maximum)
Maximum Sink/Source Current
250 mA/output
Output Saturation Voltage
0.9 V at maximum current
Output Resistance
3.7 Ω
Rise / Fall Time
250 µs (2K pull up to 24V)
Reset State
Output Off (High Impedance State)
Table 3-17:
Digital Output Connector Pinout [-EB1]
Pin#
Description
In/Out/Bi
Connector
1
Output Common for Outputs 0-3
N/A
2
Output 0 (Optically-Isolated)
Output
3
Output 1 (Optically-Isolated)
Output
4
Output 2 (Optically-Isolated)
Output
5
Output 3 (Optically-Isolated)
Output
6
Output Common for Outputs 4-7
N/A
7
Output 4 (Optically-Isolated)
Output
8
Output 5 (Optically-Isolated)
Output
9
Output 6 (Optically-Isolated)
Output
10
Output 7 (Optically-Isolated)
Output
Table 3-18:
Mating Connector Part Numbers for the Digital Output Connector [-EB1]
Mating Connector
Aerotech P/N
Third Party P/N
Wire Size: mm
2
[AWG]
10-Pin Terminal Block
ECK02395
Phoenix 1700841
0.5 - 0.14 [20-26]
www.aerotech.com
69
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