Tascam RS-232C HD-R1 - Manual (Page 2)

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 KΩ 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.