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Model 5C7-461 is a PC compatible temperature controller that accepts type J, K, E, or S thermocouple inputs or a ±100 mv input. An RS485 communications link is provided for direct interface to a PC with a 485 card or via an RS232 to RS485 converter. This allows the controller to be configured for different modes of operation from the PC. The RS485 communications interface is used to select or adjust field parameters or data acquisition in half duplex mode. Up to 32 units per interface are addressable over a maximum of 4,000 feet of communications cable. Once the controller is configured, the PC may be disconnected and the controller can be operated as a stand-alone unit. Communications can be reestablished at any time to adjust the settings. All parameter settings are retained in nonvolatile memory.
The controller package consists of a printed circuit card mounted to a metal mounting bracket that is DIN compatible and may be mounted either horizontally or vertically. The controller can be operated from either 110 VAC or 220 VAC, which is field selectable. Input and power outputs are made via .250 and .110 fast tab connections. The sensor inputs and RS485 connections are via a Euro style screw terminal strip. A solid state relay output provides current capability up to 15 amperes at either 110 VAC or 220 VAC. In addition, an alarm output solid state relay is provided which is rated for 0.5 ampere at either 110 VAC or 220 VAC plus a 5 volt drive signal rated at 20 ma for an optional LED alarm monitor, solid state relay, or reed relay.
The PC permits the monitoring of actual temperature, set temperature, percent of power applied to the load, and alarm status. It allows selection of the set temperature, turning the power on or off, canceling an alarm condition by silencing the PC audio alarm, tuning the controller setting parameters and displaying the current sensor selection.