Microcom 428M, Operator'S Manual

Page: 73 / 207

Chapter 5 Printer Commands
428M Operator’s Manual - 880028-0112 5-23
NOTE: If an input has caused an error to be generated, then goes
inactive, and another print request received before the error is cleared,
the printer will not print and will remain in the error state. A status
request will show the active error inputs. This condition will remain until
the error is cleared.
NOTE: Default power up will disable I/O mode.
The P17 and P21 connectors are 8 pin MTA50 AMP part number
#1445350-8 and Microcom Corporation part number 510188-0008.
The pin out is as follows (the square pad denotes pin one on the PCB):
Connector P17 is the input port.
1 = ground
2 = g/p input 1
3 = ground
4 = g/p input 2
5 = ground
6 = g/p input 3
7 = ground
8 = g/p input 4
All inputs are active high. 24.0 VDC = high 0.0 VDC = low
Connector P21 is the output port.
1 = ground
2 = g/p output 1
3 = ground
4 = g/p output 2
5 = ground
6 = g/p output 3
7 = ground
8 = g/p output 4
All outputs are active high. 24.0 VDC = high 0.0 VDC = low
Pin 1
P17
INPUTS
P17
OUTPUTS
Pin 1
Figure 5-1 General Purpose Hardware Inputs and Outputs