Rs-232 pinouts, Parallel port, Inputs – Telos ZephyrExpress User Manual
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Z
EPHYR
E
XPRESS HARDWARE
RS-232 Pinouts
PIN
FUNCTION
2
Rx (Computer to ZephyrExpress)
3
Tx (ZephyrExpress to Computer)
4
DTR (ZephyrExpress ready output)
5
Ground
h
HOT TIP!
This port is configured as DTE, not DCE. This means pins 2 and 3 are wired like a
computer instead of as a modem. You can plug in a standard modem, set for
auto-answer, to remotely control ZephyrExpress for automated remote
broadcasting. If you want to connect directly to a computer, you’ll need a null
modem (a molded plug/jack with crossed wires, available from computer stores)
or will want to cross pins 3 and 4 in the cable.
Parallel Port
The parallel port functions are not available as of ZephyrExpress software version 1.2.1. If
you’re using a subsequent update that supports the parallel port, here’s how it’s wired:
Parallel Port
PI
N
FUNCTION
PIN
FUNCTION
1
Ground
9
N/C
2
Output 2
10
Output 0
3
Status Out
11
Output 1
4
Output 3
12
N/C
5
N/C
13
Input 2
6
Input 3
14
Input 1
7
Input 0/Panic Dial
15
N/C
8
+5 volts 400 ma max.
Inputs
All parallel port inputs are wired to accept either a voltage (up to +24 DC) or a closure to
ground. Ground closures can be through switches or either pulled-up or open-collector
logic outputs.