General Specifications - Yokogawa Electric Corporation


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General Specifications

Model MA7D Distributor (Dual-output and Unified Signal Type)

GS 77J04A07-02E

■ General The MA7D is a insulated dual-output, plug-in type distributor that is used in combination with a two-wire type transmitter to convert the transmitter’s 4 to 20 mA DC signals into isolated 4 to 20 mA DC current or 1 to 5 V DC voltage signals. • Supports BARD-800. • Provided with Power indicator lamp

F02.EPS

■ Standard Performance

■ Model and Suffix Codes MA7D-

-

Model Input signal A: 4 to 20 mA DC Output-1 signal A: 4 to 20 mA DC

6: 1 to 5 V DC

Output-2 signal A: 4 to 20 mA DC

6: 1 to 5 V DC

Power supply 3: 24 V DC10% 4: 85-132 V AC / 85-150 V DC 5: 170-264 V AC

F01.EPS

● Items to be specified when ordering • Model and Suffix Codes: e.g. MA7D-AA6-3 Note: When output signals of 4 to 20 mA and 1 to 5 V DC are required, specify Output-1 as 4 to 20 mA DC because of the allowable load resistance.

■ Input/Output Specifications Input signal: 4 to 20 mA DC signal from two-wire type transmitter Input resistance: 250  Transmitter power supply: 25.250.25 V DC (provided with a current limiter to keep the current between 25 and 35 mA) Allowable conductor resistance (RL): Up to [(20 – transmitter’s minimum operating voltage) V/0.02 A]  Maximum allowable input current: 40 mA DC Output signal: 1 to 5 V DC voltage or 4 to 20 mA DC current insulated dual outputs Allowable load resistance:

Accuracy rating: 0.1% of span Response speed: 150 ms, 63% response (10 to 90%) Insulation resistance: 100 M minimum at 500 V DC between input, output-1, output-2, power supply and grounding terminals mutually Withstanding voltage: 2000 V AC for one minute between input, (output-1 and output-2), power supply and grounding terminals mutually; 1000 V AC for one minute between output-1 and output-2 terminals Operating temperature range: 0 to 50°C Operating humidity range: 5 to 90% RH (no condensation) Supply voltage range: 24 V DC10%, 85-150 V DC , 85-132 V AC, 170-264 V AC (47-63 Hz) Effects of power line regulation: Up to 0.1% of span for the regulation within allowable range of each supply voltage range Effects of ambient temperature variations: Up to 0.15% of span per 10°C Power consumption: 2.6 W at 24 V DC; 2.3 W at 110 V DC; 4.6 VA at 100 V AC; 6.5 VA at 200 V AC

■ Mounting and Appearance Material: ABS resin (casing) Mounting method: Wall or DIN rail mounting More than 5 mm interval is required for side-by-side close mounting. Connection method: M3.5 screw terminals External dimensions: 85 (H)51 (W)132 (D) mm (including a socket) Weight: Approx. 250 g (main unit), approx. 80 g (socket)

■ Accessories Spacer: One (used for DIN rail mounting)

Output-1 Range Allowable Load Resistance Output-2 Range Allowable Load Resistance 4 to 20 mA DC 750  maximum 4 to 20 mA DC 350  maximum 1 to 5 V DC 2 k minimum 1 to 5 V DC 2 k minimum T02.EPS

Zero adjustment: –5 to 5% Span adjustment: 95 to 105% GS 77J04A07-02E ©Copyright Jul. 2003 (MC) 2nd Edition Sep. 2004 (KP)

2

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■ Terminal Assignments 8 7

1 2 3 4 5 6 7 8 9 10 11

6 5 4

9

3

10 11

1 2

OUTPUT-1 OUTPUT-1 N.C. INPUT INPUT INPUT SUPPLY SUPPLY GND OUTPUT-2 OUTPUT-2

(+) (–) (PS+) (–) (COM) (L+) (N–) (+) (–) F03.EPS

■ Block Diagrams (1) Combination with two-wire type transmitter using internal power supply

(2) Combination with two-wire type transmitter using external power supply External power supply

Power supply

Transmitter PS+ –

4

Overcurrent protect circuit

5

Low drift input processing circuit

Transmitter Z

4

S

+

Insulation circuit

5

4~20 mA

Output-1 circuit

COM 6

2 Z



1 +

6

OUTPUT-1 –

S

Insulation circuit Output-2 circuit

10 1 + OUTPUT-2 11 2 –

7 Power supply circuit

8 9 6

L+ SUPPLY N–

(3) Example to construct Intrinsically Safe System using Zener Barrier Transmitter +

4

4~20 mA



5 6

GND

F04.EPS

■ External Dimensions Main unit

Main unit fixing stopper (Upper, lower)

Socket Unit: mm

18

40

81

85

35.4

80

86.5

2-Ø4.5 mounting holes (Depth 24)

DIN rail 11-M3.57 screws

50

103 132

29

3.3

7.8 51 max. F05.EPS

• The information covered in this document is subject to change without notice for reasons of improvements in quality and/or performance. All Rights Reserved. Copyright © 2003, Yokogawa Electric Corporation

GS 77J04A07-02E 2nd Edition Sep. 01, 2004-00