Wachendorff LD4A05P0 Current-/voltage display LD4A05P0 LD4A05P0 Datenbogen

AIR PRESSURE STABILIZATION VENT

(57.15)

2.25

X

Z

Y

The Large Display is a versatile display available as a DC volt, current, or 

process meter with scaling, serial communications and dual relay outputs. The 5  
digit displays are available in either 2.25" or 4" high red LED digits with 
adjustable display intensities. The 2.25" high models are readable up to 130 feet. 
The 4" high models are readable up to 180 feet. Both versions are constructed 
of a NEMA 4X/IP65 enclosure in light weight aluminum.

All models also come with dual  Form C relay outputs and RS232 / RS485 

serial communications.

All safety regulations, local codes and instructions that appear in this and 

corresponding literature, or on equipment, must be observed to ensure personal 
safety and to prevent damage to either the instrument or equipment connected to 
it. If equipment is used in a manner not specified by the manufacturer, the 
protection provided by the equipment may be impaired.

LD2A

2.25" High 5 Digit Red LED Volt/Current Meter w/ 
Relay Output and RS232/RS485 Serial Comms

LD2A05P0

LD4A

4" High 5 Digit Red LED Volt/Current Meter w/ 
Relay Output and RS232/RS485 Serial Comms

LD4A05P0

LD Plug

Panel Meter Plug for LD models 
  (NOT included in LD Product UL File)

LDPLUG00

1. DISPLAY: 5 digit, 2.25" (57 mm) or 4" (101 mm) intensity adjustable Red LED 

(-99999 to 99999)

2. POWER REQUIREMENTS:

AC POWER: 50 to 250 VAC 50/60 Hz, 26 VA
DC POWER: 21.6 to 250 VDC, 11 W
DC Out: +24 VDC @ 100 mA if input voltage is greater than 50 VAC/VDC 

+24 VDC @ 50 mA if input voltage is less than 50 VDC

Isolation: 2300 Vrms for 1 min. to all inputs and outputs

3. INPUT RANGES: Jumper Selectable

D.C. Voltages: 200 mV, 2 V, 20 V, 200 V, 10 V

D.C. Currents: 200 

A, 2 mA, 20 mA, 200 mA

D.C. Process: 4 to 20 mA, 1 to 5 VDC, 0/1 to 10 VDC

4. OVERRANGE/UNDERRANGE INDICATION:

Input Overrange Indication:  “

OLOL

”.

Input Underrange Indication:  “

ULUL

”.

Display Overrange/Underrange Indication: “

.....

”/“-

.....

” 

  2.25" & 4" HIGH RED LED DIGITS

  PROGRAMMABLE SCALING AND DECIMAL POINTS

  PROGRAMMABLE USER INPUT

  DUAL 5 AMP FORM C RELAY

  ALUMINUM NEMA 4X/IP65 CASE CONSTRUCTION

  RS232/RS485 SERIAL COMMUNICATIONS

  UNIVERSALLY POWERED

Bulletin No.  LDA-C
Drawing No.  LP0673
Released  09/09

Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net

Read complete instructions prior to 

installation and operation of the unit.

Risk of electric shock.

200 mV

0.1% of span

1.027 M



75 VDC

10 μV

70 ppm /°C

2 V

0.1% of span

1.027 M



75 VDC

0.1 mV

70 ppm /°C

20 V

0.1% of span

1.027 M



250 VDC

1 mV

70 ppm /°C

10 V

200 V

0.1% of span

0.1% of span

538 K



1.027 M



30 V

250 VDC

1 mV

10 mV

70 ppm /°C

70 ppm /°C



200 μΑ

0.1% of span

1.111 K



15 mA

10 nA

70 ppm /°C

2 mA

0.1% of span

111 



50 mA

0.1 μA

70 ppm /°C

20 mA

0.1% of span

11 



150 mA

1 μA

70 ppm /°C

200 mA

0.1% of span

1 



500 mA

10 μA

70 ppm /°C



22 (558.8)

12 (304.3)

7.875 (200)

26 (660.4)

LD4A05P0

4 (101.6)

16 (406.4)

LD2A05P0

The protective conductor terminal is bonded to conductive 

parts of the equipment for safety purposes and must be 
connected to an external protective earthing system.

4 - 20 mA

Use the 20 mA range

1 - 5 VDC

Use the 10V range

1 - 10 VDC

Use the 10V range

CC

US LISTED

US LISTED

UL

R

51EB

IND. CONT. EQ.

CC

US LISTED

US LISTED

UL

R

LABORATORY EQUIPMENT

3RSD