Specifications

15
6.0 SERIAL INTERFACE
A serial data communication interface is provided on the MSB-25 scale. This interface serves as the means to
receive weight data from a remote scale, to respond to enquiry from auxiliary computer or to print displayed data
with descriptive identifiers on a serial printer such as an Epson MX100 or compatible. Note: Requires cable
8510-C304-GA. Available from our Parts Department at 1-800-641-2045 or by email at [e-mail].
The signal characteristics conform to the definitions of ANSI/EIA-232D.
When the unit is ready to recognize received data on its RX line (pin 3), it will change the voltage on its DTE-
Ready line (pin 20) from an 'OFF' to an 'ON'. When transmission is initiated by pressing the PRINT XMIT key on
the keypad, or by receipt of an ENQ character (05 hex) on the receive RX line, the unit will transmit data on its TX
line (pin 2) only if it receives an 'ON' signal on its DCE-Ready line (pin 6).
Signal levels
Mark -3V to -12VDC (Logic 1)
Space 3V to 12VDC (Logic 0)
Signal identification
PIN 1 CHS Protective ground
PIN 2 TX Transmitted data, from MSB-25
PIN 3 RX Received data, to MSB-25
PIN 6 DSR Data set ready, to MSB-25
PIN 7 COM Signal ground
PIN 20 DTR Data terminal ready, from MSB-25
Data format
1200 baud (standard), 1 start bit, 7 data bits, no parity, 2 stop bits on transmit, 1 stop bit on receive
Record formats (depending upon current mode of MSB-25)
WEIGHT
SWWWWWW_lb_M_CC_<CR><LF>
SPP_lb_00.00_oz_M_CC_<CR><LF>
COUNT
COUNT_NNNNNN_<CR><LF>
PIECES PER POUND
PC/LB_NNNNNN_<CR><LF>
AVERAGE WEIGHT PER PIECE
WT/PC_SPPPPPP_lb_<CR><LF>
WT/PC_SPP_lb_oo.oo_oz_<CR><LF>
S =
P =
W =
O =
M =
CC =
N =
<CR> =
<LF> =
_=
Space (positive) or - (negative)
Pounds, Leading zero suppressed to space,
embedded decimal point (if any)
WEIGHT VALUE in decimal pounds
Ounces, decimal always present as shown
Modes: G = gross, N = net, T = tare
MO = Motion
CZ = Center of zero*
OC = Over capacity*
BZ = Below zero
*(reflects state of gross weight only)
Number for count or pieces per pound, decimal
point (if any)
Carriage return (OD hex)
Linefeed (OA hex)
space (20 hex)
INTERCONNECTIONS
DATA OUTPUT CONNECTION DIAGRAM
PIN LOCATION AS VIEWED FROM MSB-25 REAR PANEL
1 13
14 25