Epson EPL-7500 User Manual - Page 189

Serial interface pin assignments, signals is given relative to the printer.

Get Epson EPL-7500 PDF manuals and user guides View all Epson EPL-7500 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 189 highlights

Serial interface pin assignments The serial interface connector pin assignments and a description of the interface signals are shown in the table below. The direction of signals is given relative to the printer. Signal Pin RS-232C RS-422 Direction Description 1 CHASSIS CHASSIS - GND GND Printer's chassis ground, which is connected with the logic ground. 2 TXD (SYNC) OUT Transmits data. This pin transmits serial (Ignored) data from the printer to the computer. 3 RXD (TXD-) IN Received data. This pin transmits serial (OUT) data from the computer to the printer. 4 RTS (GND) OUT Request to send This pin IS held HIGH (-) by the printer. 5 CTS (RXD-) ignored Clear to send. This pin indicates that (IN) the computer is ready to receive data from the printer. The printer will not proceed unless the signal is HIGH. Can be set HIGH with SelecType. 6 DSR (TXD+) IN Data set ready. This pin indicates that (OUT) the computer IS ready to receive data from the printer. Can be set HIGH with SelecType. 7 SG Signal ground This pin provides a ground for all the signal lines. 8 DCD (RXD+) IN Data carrier detect. Always ignored. (IN) Technical Specifications 8-15

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
Serial interface pin assignments
The serial interface connector pin assignments and a description of
the interface signals are shown in the table below. The direction of
signals is given relative to the printer.
Signal
Pin
RS-232C RS-422 Direction
Description
1
CHASSIS CHASSIS -
Printer’s chassis ground, which is
GND
GND
connected with the logic ground.
2
TXD
(SYNC)
OUT
Transmits data. This pin transmits serial
(Ignored)
data from the printer to the computer.
3
RXD
(TXD-)
IN
Received data. This pin transmits serial
(OUT)
data from the computer to the printer.
4
RTS
(GND)
OUT
Request to send This pin
IS
held HIGH
(-)
by the printer.
5
CTS
(RXD-) ignored
Clear to send. This pin indicates that
(IN)
the computer is ready to receive data
from the printer. The printer will not
proceed unless the signal is HIGH. Can
be set HIGH with SelecType.
6
DSR
(TXD+)
IN
Data set ready. This pin indicates that
(OUT)
the computer
IS
ready to receive data
from the printer. Can be set HIGH with
SelecType.
7
SG
Signal ground This pin provides a
ground for all the signal lines.
8
DCD
(RXD+)
IN
Data carrier detect. Always ignored.
(IN)
Technical Specifications
8-15