IBM TM7 - Manual (Page 104)

v When operating in RS-485 mode, the +38 V dc is converted to +24 V dc and the
+5 V dc is passed straight through.
v When operating in RS-232 or USB mode or RS-485 mode in Japan, the +24 V
dc is passed through and is also converted to +5 V dc.
Note: Both voltage sources should not be connected to the printer at the same
time, even if one of the sources is powered off. System damage could occur
under these conditions.
RS-485 Serial I/O Parameters
Printer Address: 35
AWAIT-60H extra stop bits (after printer address)
BWAIT-48H extra bits/byte (after printer data bytes)
For more information about serial I/O communications, see 4680 Store Systems
Serial I/O Channel Attachment Information, which is available from IBM Industry
Corporate Relations.
Cash Drawer Connector Pin Assignments
The SureMark printers have a single cash drawer connector. This connector can
drive either a single cash drawer (see “Description of Models” on page 4 for the
cable part number) or two cash drawers using a special cable. The connector also
provides a status line which indicates if one of the cash drawers is open.
Drive voltage for each cash drawer solenoid is 24 V dc at a current of 1 ampere.
Connector pins are assigned as follows:
Pin Signal
1 Not Connected
2 Solenoid 1 Driver
3 Cash Drawer Status
4 +24 V dc
5 Solenoid 2 Driver
6 Ground
The cash drawer solenoids should be connected between pins 4 and 2 for cash
drawer 1 and between pins 4 and 5 for cash drawer 2. A
″Y″ cable is required to
bring out all the appropriate lines to attach the two units.
The cash drawer status line has a 10k resistor pull-up connected to the +5 V dc.
Note: The drawer sensor should switch pin 6 to pin 3 when the drawer is open.
RS-232 Connector Pin Assignments
SureMark printers contain a 9-pin D-shell connector port for RS-232 communication.
This port is on the interface card, accessible under the printer without removing
printer covers. The connector has the following pin functions:
Pin Signal
1 Not Connected
2 Transmit
updated March 18, 2002
80 SureMark DBCS User’s Guide
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