Jenn-Air 1892, 1300 manual Connections & Indications, RS232 Connector, Pin No Function

2CONNECTIONS & INDICATIONS

2.1RS232 Connector

The RS232 connections are made via a 9 way D female with the following connections:

Pin No.	Function
1	CD Output
	Set (+ve) when a RF signal above a certain level is present at the
	RF connector. The threshold is programmable over 10 levels that
	are defined in section 5.13
2	RXD	RS232 data level data output
3	TXD	RS232 level data input
4	DTR	RS232 level input
	When set (+ve) by the DTE (host processor) the modem and
	transceiver is turned on. The max/min levels are:
		DTR Vin Min.	(off state)	=	-15V
		DTR Vin Max.	(off state)	=	+2.5V
		DTR Vin Min	(on state)	=	+5V
		DTR Vin Max	(on state)	=	+15V
		DTR Iin Max(on state) =		4mA
5	Signal Ground
6	DSR	RS232 level output
	Set (+ve) after power is applied to the modem or when the DTE
	(host processor) sets DTR +ve. The output is active when the
	modem is ready to receive data. The time taken for the output to
	become active is <50ms from when DSR or power is applied to
	the modem.
7	RTS	RS232 level input
	The RTS input must be set (+ve) for both data and configuration.
	Data is ignored when RTS is clear (-ve).
8	CTS	RS232 level output
	Set (+ve) if the transmit RS232 data into the modem can be
	accepted and the RTS input is set, it is cleared (-ve) otherwise.
	Clearing of this signal indicates that the input transmit buffer is
	nearly full .The RS232 data must be stopped within 10 bytes of
	this signal being cleared. After this point the data is ignored. The
	CTS signal is set again if there is room for more than 10 bytes.
9	n/c
		Table 1 Data Connections

Hermes Operator Note Page 5 of 32