Keithley MSSR-32 Packing List

Channel solid state i/o module system for the metrabus

This product is not intended for use in circuits carrying voltages in excess of 30V RMS, 42.4V

peak, or 60VDC

Functional description

Keithley's MSSR-32 is a 32-channel digital I/O interface for the METRABUS industrial data acquisition and control family.

Up to 32 industry standard miniature solid state I/O modules can be mounted on a single board. The MSSR-32 rack uses 4 con-

secutive addresses in the 64-bit METRABUS address space. This allows up to 16 MSSR-32 boards (512 I/O points) to be con-

nected to a single METRABUS driver card.

The MSSR-32 is divided into four 8-bit ports. Modules can be installed in any combination of inputs and outputs (though pro-

gramming is simpliﬁed if only one type of module is used in any one MSSR-32 8-bit port).

The MSSR-32 uses 5 volt power only, and one or two MSSR-32s can be operated directly from the host computer's power sup-

ply. For larger systems, a MBUS-PWR power supply should be installed.

Speciﬁcations

Metrabus address space

4 consecutive addresses

Power requirements

+5V: 700 mA typ, 840 mA max

±15V: Not used

Module output current

Modules rated at 3 Amp max with 5 Amp overload protection fuses on MSSR-32.

Physical

Dimensions: 16 in × 4.75 in (40.63 cm × 12.06 cm)

Operating temp: 0 to +70°C

Storage temp: -20 to 100°C

Humidity: 0 to 90% non-condensing

Available miniature solid state I/O modules

SM-ODC5: Control 3 to 60 VDC at 3 Amps

SM-IDC5: Sense 3.3 to 32 VDC

MSSR-32 32-Channel Solid State I/O

Module System for the Metrabus

WARNING

Packing List

PA-641 Rev. A / 4-99

Table of Contents

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Page 1 Keithley’s MSSR-32 is a 32-channel digital I/O interface for the METRABUS industrial data acquisition and control family. Up to 32 industry standard miniature solid state I/O modules can be mounted on a single board. The MSSR-32 rack uses 4 con- secutive addresses in the 64-bit METRABUS address space.
Page 2 Safety precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualiﬁed personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
Page 3 Operation safety Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test ﬁxtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present.