Brand:ABB

Type:PFEA112-65 3BSE030369R0065

Origin: the Swiss

Warranty: 365 days

Colour: new/used

Shipping method: Courier delivery

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Serial Communications There are three serial communications ports on the 505E. Ports one and two are for Modbus communications and can be configured for RS-232, RS-422, or RS485 communications. Figures 2-10, 11, and 12, show the communications port connections for ports #1 and #2. Ports one and two are accessed though terminal blocks located on the 505E’s back side. RS-422 and RS-485 communication lines can function up to a length of 4000 feet. Refer to the Modbus section of this manual for a list of all the commands and parameters available through ports one and two. The third port, utilizing a 9-pin Sub-D connector, is dedicated for uploading and downloading unit configuration values at the factory. The Program Mode can not be accessed through the communication ports. Program configuration must be done from the keypad on the front of the control. Modbus Wiring The 505E control can communicate to two devices via RS-232, RS-422, or RS485 using an ASCII or RTU Modbus transmission protocol. Each communications port is brought out to terminal blocks for wiring. Each communications mode is wired to different terminals. The following sections identify the terminal landings required for each mode. RS-232 Wiring A RS-232 link is limited to a distance of 50 feet. The 505E control utilizes terminal blocks 114-117 and 106-109 for RS-232 connections. Figure 2-10 shows typical RS-232 communications connection. The transmit data (TXD), receive data (RXD), and signal ground (SIG GND) must be properly connected as shown. In addition the shield (SHLD) should be connected in at least one

RS-422 Wiring An advantage of RS-422 communications is that it uses a differential voltage and can accommodate much longer transmission distances. A RS-422 link can communicate up to a distance of 4000 feet. The 505E control utilizes terminal blocks 108- 113 and 116-121 for RS-422 connections. Figure 2-11 shows a typical RS-422 communications connection. The transmit data pairs (422T+ and 422T-), receive data pairs (422R+ and 422R-), and signal ground (SIG GND) must be properly connected as shown. In addition, the shield (SHLD) should be connected in at least one location. The last unit in the Modbus network chain, and only the last unit, should have it’s receiver terminated with a resistor. The 505E control has termination resistors built-in, see the jumper option chart (Table 2-1) to connect the termination resistor. Figure 2-11. Typical RS-422 Communications RS-485 Wiring RS-485 communications can also accommodate transmission distances of up to a distance of 4000 feet. The 505E control utilizes terminal blocks 108-111 and 116-119 for RS-485 connections. Figure 2-12 shows a typical RS-485 communications connection. The data lines (422R+/485+ and 422R-/485-) and signal ground (SIG GND) must be properly connected as shown. In addition, the shield (SHLD) should be connected in at least one location. The last unit in the Modbus network chain, and only the last unit, should have it’s receiver terminated with a resistor. The 505E control has termination resistors built-in, see the jumper option chart (Table 2-1) to connect the termination resistor.