Keithley STP-36CJC Quick Start Manual

Keithley Instruments, Inc.

28775 Aurora Road
Cleveland, Ohio 44139
[phone]
Fax: [phone]
www.keithley.com

Model STP-36CJC Screw Terminal Connector

Packing List

Introduction

This document contains information necessary to successfully install your hardware.

NOTE Only used with analog connector on KPCI-3108/7 boards.

WARNING The STP-36CJC is not intended for use in circuits carrying voltages in excess of

30V RMS, 42.4V peak, or 60VDC.

General definitions

The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, and for ensuring that oper-

ators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the

instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating, for example, setting the line voltage

or replacing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state if the
operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only properly

trained service personnel may perform installation and service procedures.

!

The

The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of
normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages.

The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the associated
information very carefully before performing the indicated procedure.

The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the warranty.

symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.

Descriptions

The screw terminals on the STP-36CJC screw terminal connector let you connect field wiring to the analog connector on the
KPCI-3108/7 board using a CAB-1284CC cable. The screw terminals are labeled from 1 to 36 and correspond directly to the
functions of the pins on the main analog I/O connector on the KPCI-3108/7 board. For example, if pin 24 is assigned to the
analog function OP0, use screw terminal 24 to attach hardware to output 0. Refer to the KPCI-3108/7 Series User’s Manual for
detailed wiring information on connecting the STP-36CJC.

PA-742 Rev. B / 10-02

2

The jumpers on the STP-36CJC are used to connect the onboard cold junction compensation circuit to analog input Channel 0
of the 3108/7 PCI board. This circuit is powered by the 3108/7 board and provides accurate cold junction compensation when
using thermocouples. By removing the jumpers, Channel 0 is available as a voltage input. See “Configuring the STP-36CJC”
for more information.

The STP-36CJC panel has rubber feet and mounting holes.

WARNING When using the STP-36CJC, the maximum voltage allowed is 30V RMS, 42.4V peak, or

60VDC. Exceeding this limit could cause an insulation failure and shock hazard.

CAUTION Although the STP-36CJC is rated for 60 volts peak-to-peak, the KPCI-3108/7 is rated

for a much lower voltage. The KPCI-3108 analog inputs can only tolerate 35 volts peak
without damage.

Specifications

Voltage: 30V RMS, 42.4V peak, or 60VDC
Current: 1 amp maximum
Operating temperature: 0°C to +85°C
Dimensions: L: 133mm (5 ¹⁄₄ in) × W: 72mm (2 ¾ in) × Η: 32mm wide (1 ¹⁄₄ in)
CJC Specifications:

CJC Output: +10mV/°C
CJC Accuracy: ±0.5°C (at 25°C)

±1.5°C (over full temperature range)

RMS noise: 0.05°C

Safety precautions

Observe the following safety precautions 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. Read the operating information carefully before using the product.

Installation

As described in the International Electrotechnical Commission (IEC) Standard IEC 664, the signal terminals are Installation
Category I and must not be connected to mains.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.

Operators and maintainers of this product must be protected from electric shock at all times. The responsible body must ensure
that users are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to
potential human contact. Product users in these circumstances must be trained to protect themselves from the risk of electric
shock. If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.