Campbell Scientific CR10 CR10 Measurement and Control - Page 75

SECTION 6. g-PIN SERIAL INPUT/OUTPUT 6.1 PIN DESCRIPTION All external communication peripherals connect to the CR10 through the 9-pin subminiature Dtype socket connector located on the front of the Wiring Panel (Figure 6.1-1). Table 6.1-1 shows the l/O pin configuration, and gives a brief description of the function of each pin. qrRtAr | /o 51 ooooo oooo 96 FIGURE 6.1-1. 9-pin Female Connector TABLE 6.1-1. Pin Description = ABR Abbreviation for the function name. = PIN Pin number. = o SignalOut of the CR10 to a peripheral. I = Signal lnto the CR10 from a peripheral. UO PIN ABR Descriotion 1 5V O 5V: Sources 5 VDC, used to power peripherals. SG I RING RXD I ME O Signal Ground: Provides a power return for pin 1 (5V), and is used as a reference for voltage levels. Ring: Raised by a peripheral to put the CR10 in the telecommunications mode. Receive Data: Serial data transmitted by a peripheral are received on pin 4. Modem Enable: Raised when the CR10 determines that a modem raised the ring line. PlN ABR vo 6SDEO 7 CLKHS YO TE o 9 TXD o Description Synchronous Device Enable: Used to address Synchronous Devices (SDs), and can be used as an enable line for printers. Clock/Handshake: Used with the SDE and TXD lines to address and transfer data to SDs. When not used as a clock, pin 7 can be used as a handshake line (during printer output, high enables, low disables). Tape Enable: Powers the cassette recorder during tape transfer. Transmit Data: Serial data are transmitted from the CR10 to peripherals on pin 9; logic low marking (0V) logic high spacing (5V) standard asynchronous ASCIl, 8 data bits, no parity, 1 start bit, 1 stop bit,300, 1200,9600, 76,800 baud (user selectable). 6-1