Telos Zephyr Xstream - Manual (Page 63)

USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 51
Parallel Control Port
The parallel control port has 8 inputs and 8 outputs that can be used in a variety of ways. For
instance, in AAC, AAC‐LD, Layer 3 and certain Layer 2 modes, these contact closures can
communicate between two Zephyr Xstreams. By grounding an input on the local Xstream, you
would therefore cause current to flow into the corresponding output at the far end unit. These
can also be used for local control and to monitor local status.
Z
ZEPHYR CLASSIC VS. XSTREAM COMPARISON!
The original Zephyr has only four inputs and outputs numbered 0-3 while the Xstream has 8
inputs 0-7. The four inputs and outputs of the Zephyr will communicate with the first four
inputs and outputs of the Xstream (i.e. 0-3).
PIN FUNCTION
1 +5 Volts DC 400 mA max
2* Output 0
3* Output 1
4* Output 2
5* Output 3
6 Output 4
7+ Output 5
8+ Output 6
9+ Output 7
10 No Connection
11 No Connection
12 No Connection
13 No Connection
14* Input 0
15* Input 1
16* Input
2
17* Input 3
18 Input
4
19+ Input 5
20+ Input
6
21+ Input 7
22 Not
Connected
23 Not Connected
24 Not Connected
25 Ground
*
These pins are compatible with the
corresponding input/outputs of the
Zephyr Classic.
+
These pins are compatible with the
corresponding inputs/ outputs of
the Zephyr Xport
NOTE: Pin 1 is connected directly to the +5 volt power supply. Failure to limit current
draw on this pin could cause hardware damage or system instability.