accordingly, it may be necessary to provide a delay between characters transmitted to the Interface at
the highest baud rates. All possible combinations of the 3 jumpers, on or off, result in the following 8
possible baud rates:
Baud Rate P3 Jumpers: B2 B1 B0
110 OFF OFF OFF
300 OFF OFF ON
600 OFF ON OFF
1200 OFF ON ON
2400 ON OFF OFF
4800 ON OFF ON
9600 ON ON OFF
19200 ON ON ON
2.10.4 SERIAL CABLING
The Model 2022 Interface connects to the host via 25-pin, female "D" connector - P2. Therefore, a
cable with a 25-pin, male "D" connector on one end and the appropriate connector required for the host
on the other end must be built or purchased.
Determine which type of equipment you have for your host. Any one of these combinations will suffice.
* If you have Data Communications Equipment (DCE) with a female DB25 connector, use a
DB25 male/male cable assembly. RFID can provide this component, P/N 730-0001-xx, with the last 2
digits indicating your desired cable length in feet.
* If you have DCE with a male DB25 connector, use the above indicated cable assembly and a
female/female connector adapter that is a gender changer.
* If you have Data Terminal Equipment (DTE) with a male DB25 connector, use the cable
assembly and a connector adapter modem eliminator (RFID P/N 730-0003-00). The modem
eliminator switches the activity on pins 2 & 3, so that they do not transmit and receive on the same lines.
* If you have DTE with a female DB25 connector, you must again use the cable assembly and
the connector adapter modem eliminator. You must also utilize a female/female connector adapter to
change the gender of the DB25 connector.
2.10.5 SERIAL CONNECTION
The Interface is configured as Data Terminal Equipment (DTE) meaning that it transmits its data on pin 2
and receives data on pin 3. Since most terminals and IBM-PC compatible interfaces are also
configured as DTE, the interface cable will probably have to connect the Interface's pin 2 to the host's
pin 3 and the Interface's pin 3 to the host's pin 2. There exist simple converters called modem
eliminators, which accomplish this, discussed in the section above. Since RS-232 and RS-422 pin
designations are not standardized, check your host's operating manual for verification. The important
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