Altinex manual CP7317RS DESCRIPTION, CP7317RS FEATURES 4.1 RS-232 PORT, Pin No. on RS-232 port

CONTROLLERS

CP7317RS DESCRIPTION 4

CP7317RS FEATURES

4.1RS-232 PORT

This port (located next to the power outlet) is a fully programmable, bi-directional, and full duplex port that has the ability to operate at any baud rate up to 9600. The general standard on transmission is 8 bits, no parity, and 1 stop bit. The factory default for communication through this port is 2400 baud. Several standard baud-rates are available through programming: 300, 600, 1200, 2400, 4800, and 9600 baud. The following table shows the pin-out configuration of RS-232 ports on the CP7317RS.

Pin No. on RS-232 port	Function
2	TX (Transmit)
3	RX (Receive)
5	Ground

4.2RELAY CONTACTS

The CP7317RS has 4 ports with relay contacts. Port 1 has two groups of 4 relays. The relays are single-pole, single-throw (SPST) type and can be set to default to either a normally open or normally closed condition. Each relay of port 1 can be individually turned “ON” or “OFF”. Figure 1 shows port 1 configuration.

FIGURE 1

Port 2 has one group of 4 relays. The relays are single-pole, single-throw (SPST) type and can be set to default to either a normally open or normally closed condition. Each relay of Port 2 can be individually turned “ON” or “OFF”. Figure 2 shows Port 2 configuration.

FIGURE 2

Port 3 and 4 consist of 2 single-pole, single-throw (SPST) isolated relays each, as shown in Figure 3.

FIGURE 3

Subsequently, Port 2,3, and 4 can be treated as a single port with 8 relays or as three independent ports. Port 2 can be treated as a single port with 4 relays and Port 3 and 4 with 2 relays each.

In addition to relay contacts the CP7317RS Controller has “+5” voltage available on ports 3 and “GND”(ground) available on port 4. The (+5) volts output is designed to drive external circuitry and has 280mA maximum current output. The graph below shows the maximum of allowable current from +5V pin and through digital I/O pins as a function of the number of relays turned ON at any given time.

The ground pin on Port 4 is true ground and is connected to the system ground but it is not connected to any common pins.

4.3DIGITAL I/O PORTS

These ports are designed as general-purpose input/output ports (see Figure 4).

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