ADLINK ND-6060 - Manual (Page 35)

Introduction
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1.7 Overview of NuDAM -6058
1.7.1 What is NuDAM-6058 ?
NuDAM-6058 provides 28 digital I/O channels. It emulates industry
standard mode zero configuration of 8255 programmable peripheral
interface (PPI) chip. The PPI offers 3 ports A, B and C, the C port can also be
subdivided into 2 nibble-wide (4-bit) port – C upper and C lower. A 50 pin
SCSI connector equipped with ND-6058 which is corresponding to PPI chip
with 24 DIO points.
1.7.2 Features of NuDAM-6058
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Industry standard 8255 programmable peripheral interface mode 0
emulation
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24 Programmable I/O channels
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4 dedicated input channels
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Completely TTL compatible I/O lines
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Status read-back capability
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Direct bit set/reset capability
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Buffered circuits for higher driving capability
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Direct interface with OPTO-22 compatible I/O module
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Programmable host watchdog timer for host failure protection
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Internal watchdog timer for device failure protection
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On board resetable fuse to protect power supply form external
devices
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Easy programming by software
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Easy installation and wiring