Panduit ATLONA AT-HDR-CAT-2, Manual

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AT-HDR-CAT-2 24
RS-232 Control
The AT-HDR-CAT-2 provides two methods of RS-232 control: Pass-through mode and control mode. The MASTER
RS-232 / IR port, allows the unit to be directly controlled using a control system. In addition two pass-through RS-
232 / IR ports allow sink devices, at the viewing location, to be controlled using a control system.
RS-232 is serial data protocol that allows Data Terminal Equipment (DTE) devices, such a computer or control
system, to communicate with Data Communication Equipment (DCE) devices, such as the AT-HDR-CAT-2 or a
display. Although IP control is available, RS-232 still plays an integral part of many control systems.
The 25-pin D-type connector (DB-25) was defined as the RS-232 standard, but is now commonly implemented in a
nine-pin (DE-9) connector package. Each pin is numbered, as shown below.
DTE Pin Descriptions DCE Pin Descriptions
Pin Signal Description
1 DCD Data Carrier Detect
2 RxD Receive Data
3 TxD Transmit Data
4 DTR Data Terminal Ready
5 GND Ground (Signal)
6 DSR Data Set Ready
7 RTS Request to Send
8 CTS Clear to Send
9 RI Ring Indicator
Pin Signal Description
1 DCD Data Carrier Detect
2 TxD Transmit Data
3 RxD Receive Data
4 DSR Data Set Ready
5 GND Ground (Signal)
6 DTR Data Terminal Ready
7 CTS Clear to Send
8 RTS Ready to Send
9 RI Ring Indicator
1 2 3 4 5
6 7 8 9
5 4 3 2 1
9 8 7 6
DE-9 (male) DE-9 (female)
1 2 3 4 5
6 7 8 9
5 4 3 2 1
9 8 7 6
Device Operation
RS-232 Port Wiring
When connecting a DTE device to a DCE device, a straight-through cable should be used. A straight-through cable
is wired in such a way that the pins on one side of the cable are connected to the corresponding pins on the opposite
side of the cable, as shown in the table below. However, the AT-HDR-CAT-2 will use only TxD, RxD, and GND signals
when communicating with a control system or computer. Refer to connection instructions on the next page.
Pin Signal Signal Pin
1 DCD DCD 1
2 RxD TxD 2
3 TxD RxD 3
4 DTR DSR 4
5 GND GND 5
6 DSR DTR 6
7 RTS CTS 7
8 CTS RTS 8
9 RI RI 9
Straight-Through Cable