Modem with automatic port selection.

The PMD is a 9600 baud modem with four communication ports:
- telephone line connection
- 2 RS-232 ports
- RS-485 port
The function of the ports is set with jumpers.

The PMD offer the following possibilities:

Use as a regular modem for equipment with an RS-232 or RS-485 interface. The PMD modem is suited for use with the PRO-NET and INTELLI data acquisition systems and many industrial PLC's.

The PMD makes a very reliable modem connection, suited for industrial environments. The configuration is as follows:

The PMD can be used as a data switch. In the configuration as shown here, the data switch is used to switch between a local PC and the remote caller. When the modem is called and connects to the remote caller, the local PC is disconnected from the PRO-NET system and the remote PC gets access to the PRO-NET system.

The PMD has a built in RS-485 to RS-232 converter. In the example shown here, the INTELLI system has an RS-485 communication bus. It is connected to a local PC through the converter in the modem. As soon as the system is called with a remote modem, the local PC is disconnected from the INTELLI system and the remote PC gets access to the INTELLI system through the RS-485 to RS-232 converter in the modem.

Technical specifications PMD

Telephone/modem connection:
- type analogue
- baud rate 9600 baud

Interfaces:
- 2 x RS-232
- 1 x RS-485


Housing:
- type DIN rail mounting
- dimensions 105 (w) x 186 (d) x 45 (h)mm
- required space approx. 105 (w) x 220 (d) x 60 (h)mm

Power:
- supply voltage 8...12 VDC
- supply current 350 mA max.

The modem is suited for most western European countries. However it may not be suited for use in your country. Please contact us for details.

Switch configurations:

No remote caller.

Remote caller connected.

Ordering information:

Description:                                               Ordering reference:

PMD                                                         PMD
complete with mains adapter, telephone cable,
RS-232 cable and manual

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Last modified on: 25-11-2006