Port 1 And Port 2 Opto-Isolated Inputs (Tb204, Tb205); Table 4-7. Port 1 Opto-Isolated Input Connector Pin-Out (Tb204) - Aerotech SOLOIST Hardware Manual

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Suppression diodes must be installed on outputs that are used to drive relays or other
inductive devices to protect the output devices from being damaged by the inductive
spikes that occur when the device is turned off. Suppressor diodes can be installed on all
outputs to provide greater protection. The 1N914 diode is recommended for this
application. It is important that the diode be installed correctly (normally reversed
biased). See Figure 4-4 for an example of a current sinking output with diode suppression
and Figure 4-5 for an example of a current sourcing output with diode suppression.

4.2.4. Port 1 and Port 2 Opto-Isolated Inputs (TB204, TB205)

The digital inputs are configured for 5-24 volt logic. Using a higher input voltage,
requires adding external series resistors to limit the current. The opto-isolator is a
PS2806L-4 device. The inputs may be connected to current sourcing or current sinking
devices, as shown in Figure 4-6 and Figure 4-7. Each 8-bit bank of inputs (TB204 and
TB205) must be connected to either all current sourcing or all current sinking devices.
Also, note in the tables below that inputs TB204 and TB205 have two different common
inputs at Pin #1, respectively. See Section 3.1.3. for opto-isolated EOT limit inputs.
Table 4-7. Port 1 Opto-Isolated Input Connector Pin-out (TB204)
Pin # Label Description
Input Common for inputs 0 – 7 (TB204)
1 C
Input 0 (Optically-Isolated) – See pin 1
2 Input 0
Input 1 (Optically-Isolated) – See pin 1
3 Input 1
Input 2 (Optically-Isolated) – See pin 1
4 Input 2
Input 3 (Optically-Isolated) – See pin 1
5 Input 3
Input 4 (Optically-Isolated) – See pin 1
6 Input 4
Input 5 (Optically-Isolated) – See pin 1
7 Input 5
Input 6 (Optically-Isolated) – See pin 1
8 Input 6
Input 7 (Optically-Isolated) – See pin 1
9 Input 7
10 GND Signal Common
Inputs 0 - 7 on each Port (0, 1 and 2) must be used in all current sourcing or all
current sinking mode. No combination of these two modes is allowed.
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In/Out/Bi
Input
Input
Input
Input
Input
Input
Input
Input
Input
N.A.