HDC-UHD Series Command Guide
6
2 Communication configuration and Specifications
2.1 RS-232C communication
2.1.1 RS-232C connector specification
Insert and secure the wires from the RS-232C cable into the supplied 3-pin captive screw connector, and then
insert the captive screw connector into the mating connector on the HDC.
28 AWG to 16 AWG conductor gauge is recommended. The recommended wire strip length is 0.28 in. (7 mm).
Short RTS/CTS and DTR/DSR as needed.
Tx
Rx
GND
Up to 0.28" (7mm)
Control device
Tx
Rx
GND
HDC
RxD
TxD
GND
Signal name
(Receive Data)
(Transmit Data)
(Ground)
[Fig. 2.1] Connecting RS-232C cable to 3-pin captive screw connector
2.1.2 RS-232C communication specification
[Table 2.1] RS-232C specification
Compliant standard
RS-232C
Baud rate
4800/9600/14400/19200/38400 [bps]
Data bit length
7/8 [bit]
Parity check
NONE, EVEN, ODD
Stop bit
1/2 [bit]
X parameter
Invalid
Flow control
None
Delimiter
CR LF (Carriage return and line feed, 0D and 0A in hex)
Communication method Full duplex
