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Impulse SCMD-PB4 User Manual

Sspecification, Discrete i/o mounting boards, Phone

background image

(0.75)

19.1

(2.2) 55.9

Swaged

Standoff

thru Hole

(0.15) 3.2
Diameter

WRC4-A4T & 1781-A4T

Discrete I/O Mounting Boards

1

Phone

(330) 762-

Fax:

(330) 762-

E-mai

SALES@

wrcakron.c

Webs

http://www

wrcakron.c

S

SPECIFICATION

Power Side

Signal Side

Bit

Pos.

Neg.

Signal

DC Return

Bit 0

2

3

3

2

Bit 1

4

5

5

4

Bit 2

6

7

7

6

Bit 3

8

9

9

8

NOTES:

1. Signal-side +Vcc (terminal 1) supplies +5, +15 or +24 V dc logic voltage.

2. Logic-side dc return is connected to all even terminals on the signal side.

3. Signal terminal is pulled up to +Vcc when not asserted, and pulled down to dc return when asserted.

4. Power-side terminals are polarized for dc applications, and non-polarized for ac applications.

5. Power-side terminal 1 is not connected on 1781-A4T.

MM (in)

6.4

(.25)

0

1

2

3

1

9

1

9

101.6 (4.0)

114.3 (4.5)

76.2
(3.0)

88.9
(3.5)

Pull-up
Resistor
3.3K Typ

Spare

Power Side

Module Input/Output

Output
Barrier
Strip

Output
Barrier
Strip

1

2

3

4

5

6

7

8

9

1

2

3

4

5

1

2

3

4

1

2

3

4

1

2

3

4

LED typ.

Fuse
5A
Typ.

1

2

3

4

5

6

7

8

9

Signal Side

Module Input/Output

DC
Return

+VCC

5

5

5

101.6 (4.0)

6.4 (.25)

mm (in)

114.3 (4.5)

76.2 (3.0)

88.9 (3.5)

1781-A4T

1781-
A4T

WRC4-A4T and 1781-A4T mounting boards can be used with up to four WRC4-series
I/O modules (WRC4-A4T) or four standard, slim or miniature I/O modules (1781-
A4T). The barrier strips on the 1781-A4T accept ring or spade lug, while they both
accept insulated wire with stripped ends or ferrules. Each power side point is indi-
vidually isolated. The signal side has a common dc return and common logic supply
bus (+Vcc) for negative-true logic applications. They are designed for panel mount-
ing with four stand-offs. Specify 1782-A4T or WRC4-A4T-DIN for mounting on DIN
rails such as the WRC50022.

MOUNTING DIMENSIONS

SCHEMATIC DIAGRAMS

WRC4-
A4T

WRC4-A4T

SCMD-PB4