2
TEAC
Corporation
1.
Overview
You can control the HD-R1 from a computer or other external device using its RS-232C port. In this document,
the HD-R1 is the controlled device, and the external device that controls it is the control device.
2.
Specifications
Electrical specifications
Applicable standard
JIS X-5101 (equivalent to old JIS C-6361 and EIA RS-232C)
(Not compatible with RS-422A in commercial use VCRs and other equipment)
Receiver impedance
3 K
Ω
or more measured at applied voltage of ±3 – ±25 V
Sender open circuit voltage
±25 V or less
Receiver open circuit voltage ±3.3 or less
Signal discrimination
Logic “1”
+2 V or more
Logic “0”
+0.8 V or more
Transmission specifications
Circuit format
Three-wire, half duplex
Transmission format
Digital binary serial transmission
Data signal speed
9600 bit/sec
Character length
8 bits
Parity bit
None
Stop bit
1 bit
Note: The settings are fixed for the data signal speed, character length, parity bit and stop bit. The control device
must be adjusted to match the HD-R1 settings.
Pin configuration
Connector
D-sub 9-pin female (inch screw thread)
Port pin allocations and input and output signals
Pin
number
In/Out
Signal Description
1 -
NC
Not
used
2
In
Rx Data
Receive data*
3
Out
Tx Data
Send data
4 -
NC
Not
used
5 -
GND
Ground
6 -
NC
Not
used
7 -
NC
Not
used
8 -
NC
Not
used
9 -
NC
Not
used
*Raise the voltage of Rx Data to comply with the RS-232C standard.
