maxPAC Hardware Reference Guide
Metso Automation MAX Controls Inc. • 277596 •
10-2
Bus Address
This module requires one I/O one bus address.
Jumper Configuration
Jumper W1 configures all the outputs to either reset or fail in place when
there is no communications in the I/O Bus for more than 0.7 seconds.
Configuration is as follows:
Jumper Position 2-2 Position 1-2
W1 Reset Output Hold Output
For the IOP351 module, each channel can be strapped in the printed circuit
assembly for form A or form B operation per the following table. The default
configuration is form A for all channels.
Channel Number Form A Form B
1 R100 R101
2 R103 R104
3 R106 R107
4 R108 R109
5 R111 R112
6 R114 R115
7 R116 R117
8 R119 R120
9 R122 R123
10 R124 R125
11 R127 R128
12 R130 R131
13 R132 R133
14 R135 R136
15 R138 R139
16 R140 R141
Module Operation
The following is a simplified sketch of the circuit for one channel. The relay
drivers energize the relay coils and control the operation of the output LEDs
to correspond to the data in the I/O bus interface circuit. A watchdog timer in
the interface circuit controls the operation of the active LED, causing it to
blink when the module is not scanned for 0.7 seconds. It also controls the
state of the outputs on loss of communications.
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