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Terminal module connections include H, L, and G terminals for Channels
00 - 15, Bank 0 and Bank 1 Commons, and the AT and BT Tree Switches.
In addition, each channel H line has a jumper on the terminal module that
can be removed to add filter components, attenuators, or current shunts.
E1345A/47A
Multiplexer
Descriptions
The E1345A 16-Channel Relay Multiplexer and the E1347A 16-Channel
Thermocouple Relay Multiplexer modules consist of an E1345A
component assembly ( E1345-66201) and a terminal module. Each
multiplexer provides switching (multiplexing) of up to 16 channels
(channels 00 to 15). Each channel has HIGH (H), LOW (L),
and GUARD (G) connections. See Figure 4-1 for a block diagram of these
modules.
The component assembly is the same for the E1345A and E1347A.
The only difference between the two component assemblies is their jumper
settings. The E1345A has an E1345-80001 terminal module and the
E1347A has an E1347-80001 terminal module.
Component Assembly
Description
The E1345A Component Assembly consists of 16 channel relays and four
tree switch relays. The channel relay switches are separated into two banks,
Bank 0 (channels 00 through 07) and Bank 1 (channels 08 to 15). Each bank
has its own common H, L, and G terminals that connect to the channel
switches.
The Bank 0 channel switches also connect to the AT Tree Switch Terminals
(on the terminal module) via the AT Tree Switch (Channel 90) and three
protection resistors (R26, R27, and R28). The Bank 1 channel switches
connect to the BT Tree Switch terminals (on the terminal module) via the
BT Tree Switch (Channel 91) and three protection resistors (R29, R30, and
R31).
The AT2 Tree Switch (Channel 92) connects Bank 1 channels to the AT
Tree Switch. For the E1347A only, the RT Tree Switch (Channel 93)
connects the thermistor (on the terminal module) to the Bank 1 channel
common. This allows measurement of the thermistor to compensate for
temperature measurements made with thermocouples.
The AT Tree Switch connects to the H, L, and G connections on the Analog
Bus Connector and the BT Tree Switch connects to the I+, I-, and IG
connections on the Analog Bus Connector. The Analog Bus Connector
provides direct channel connections between multiple multiplexer modules
and connections between a multiplexer module and E1326/E1411
multimeters.
Each Bank 0 and Bank 1 Common line and AT and BT Tree Switch line has
a 100
Ω
resistor in series to provide relay contact protection. The Analog
Bus Connector also has six 100
Ω
resistor in series to provide current
protection.
Chapter 4
Service 51
Содержание Agilent E1345A
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Страница 12: ...Notes 10 What s In This Manual E1343A 44A 45A 47A 55A 56A Service Manual ...
Страница 20: ...Figure 1 2 Initial Incoming Inspection Guidelines 18 General Information Chapter 1 ...
Страница 22: ...Notes 20 General Information Chapter 1 ...
Страница 49: ...Figure 3 2 E1343A E1344A E1345A E1347A Terminal Module Mechanical Parts Chapter 3 Replaceable Parts 47 ...
Страница 50: ...Figure 3 3 E1355A E1356A Terminal Module Mechanical Parts 48 Replaceable Parts Chapter 3 ...
Страница 54: ...Figure 4 1 E1343A E1344A E1345A E1347A Multiplexer Block Diagram 52 Service Chapter 4 ...
Страница 56: ...Figure 4 2 E1355A 56A Multiplexers Block Diagram 54 Service Chapter 4 ...
Страница 64: ...Notes 62 Service Chapter 4 ...
Страница 72: ...Notes 70 Example C Programs Appendix A ...
Страница 81: ...Figure B 2 E1343A 44A 45A 47A Terminal Module Mechanical Parts Appendix B Backdating Information 79 ...
Страница 82: ...Figure B 3 E1355A 56A Terminal Module Mechanical Parts 80 Backdating Information Appendix B ...
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Страница 84: ...Copyright Agilent Technologies Inc 2005 E1345 90013 E1345 90013 ...