SECTION 10 SERIAL REMOTE INTERFACE
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10.4.2 FUNCTIONAL EXCEPTIONS
Some functions applicable with the IEEE-488 interface are NOT applicable with the RS-232 interface.
Specifically they are the following:
1. All IEEE-488.1 interface functions (see UPC MANUAL sect. 5.6.1).
2. IEEE-488.2 commands: *SRE and *SRE?, are ignored, as Service Requests and Serial Polls
are not applicable. (para. 5.5.3.1).
(Use *STB? to obtain the Status Byte.)
10.4.3 FUNCTIONAL ADDITIONS
The following commands have been added to replace functions lost due to the removal of the IEEE-
488.1 GPIB. These commands are similar to the IEEE-488.2 Common Commands and fall into the
category of DEVICE CONTROL COMMANDS (see section 5.6.2 of the UPC Manual).
*DCL DEVICE CLEAR - Causes a Hardware RESET of the UPC.
*LLO LOCAL LOCKOUT - Puts the UPC into REMOTE with LOCAL LOCKOUT state.
*GTL GOTO LOCAL - Restores LOCAL mode.
10.5 PHYSICAL CONNECTIONS
Connection to the UPC RS-232 interface is made via a DB-25 connector on the rear panel of the UPC
SCU or POWER SOURCE.
UPC Pinouts:
(For connection to IBM-PC type DB-25)
PIN 1
CHASSIS GROUND
PIN 2
TxD TRANSMIT DATA (from HOST to UPC)
PIN 3
RxD RECEIVE DATA (from UPC to HOST)
PIN 7
SIGNAL GROUND
Pinouts for IBM-PC DB-9 are listed below for reference.
PIN 2
RxD RECEIVE DATA (from UPC to HOST)
PIN 3
TxD TRANSMIT DATA (from HOST to UPC)
* PIN 5
SIGNAL GROUND
All other pins are reserved for future use.
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