VKK1-4,

Data Sheet
VKK1R-4

Junction boxes

Special features

− Parallel connection of up to
4 load cells
− Off-center load compensation via
VKK1-4 integrated resistor network
− EMC-tested per EN 45 501 and
EN 61 323 through HBM shielding
design
− Degree of protection IP65 to
EN 60 529
− VKK1R-4 with stainless housing
VKK1R-4

Dimensions (in mm; 1 mm = 0.03937 inches)

VKK1R-4

179
163 a.f. 14
45

18

6
84

52

Mounting direction 30

* depending on the cable type

Grounding screw
50...100*

M5x10 DIN 84
Scope of supply includes:
1 piece of special screws for cable
∅ 4...6.5 diameter 7.5 mm, a.f. 17

Suitable fastening screws: M4 DIN 84 or B3.9 DIN 7971 (minimum screw length 20 mm)

B2287-1.1 en
Dimensions VKK1R-4 (in mm; 1 mm = 0.03937 inches)

186 110

M4

36
176 100
204 125

190

7
Mounting direction

5x M12, a.f.14,
for cable ∅ 4 ... 6.5 mm

Specifications
Type VKK1-4 VKK1R-4
Resistor network for off-center load compensation Ω 0.39...5.71 (in 15 steps)
Max. permissible voltage V 18
Nominal temperature range −20...+85 [−4...+185]
Operating temperature range °C
C [[°F]
F] −20...+85 [−4...+185]
Storage temperature range −40...+85 [−40...+185]
EMI test
Electromagnetic field (26...1000 MHz) V/m 10
Burst (to connected cables) V 1000
Electrostatic discharge (to housing) V 6000
Weight, approx. kg 1 1.5
Max. wire cross section of cable strands mm2 1.5
Degree of protection according to EN 60529 (IEC 529) IP65 (dust−tight and protected against water jets)
Materials Housing Diecast aluminum, coated Stainless steel
(color: RAL 7035)
Sleeve nut PG7, SW14, M12, SW14,
nickel−plated brass nickel−plated brass
Clamping cone Neoprene, Neoprene,
for cable−∅ 4...6.5 mm1) für cable−∅ 4...6.5 mm
1) Scope of supply includes: 1 piece of special screws for cable diameter 7.5 mm, a.f. 17

HBM 2 B2287-1.1 en
Resistor network in the junction box for off-center load compensation with 4 load cells
Input: Output:
Load cells 1 ... 4 Amplifier

Sense (+)
Excitation (+)
4 3 2 1
Excitation (−)
Sense (−)
0.39 Ω 0.39 Ω 0.39 Ω 0.39 Ω

0.82 Ω 0.82 Ω 0.82 Ω 0.82 Ω

1.50 Ω 1.50 Ω 1.50 Ω 1.50 Ω

3.00 Ω 3.00 Ω 3.00 Ω 3.00 Ω

Signal (−)
Signal (+)

Function of the intgrated resistor network

The resistor network enables off-center load compensation for a scale to be easily made, if required.
Three steps have to be taken:
1. Load scale corners.
2. Read correction value from diagram (mounting instructions).
3. Activate compensation resistor.

B2287-1.1 en 3 HBM
Survey of HBM junction boxes

Number of Degree
Type Signal load cells that of Housing EMC
can be protec- material protec-
connect tion tion

VKK1-4 Analog 2 ... 4 IP65 Alumin. yes

Order no.: diecast
1-VKK1-4A

VKK1R-4 Analog 2 ... 4 IP65 Stainless yes

Order no.: steel
1-VKK1R-4

VKK2-8 Analog 3 ... 8 IP65 Stainless yes

Order no.: steel
1-VKK2-8

Sheet
VKK2R-8 Analog 3 ... 8 IP65 steel, yes
Order no.: powder
1-VKK2R-8 coated

VKK2R-8EX Analog 3 ... 8 IP65 Stainless yes

Order no.: steel
1-VKK2R-8EX

VKK2R-8 DIGITAL Digital 3 ... 8 IP65 Stainless yes

Order no.: steel
1-VKK2R-8DIGITAL

Modifications reserved. Hottinger Baldwin Messtechnik GmbH

All details describe our products in general form only. They
are not to be understood as express warranty and do not
constitute any liability whatsoever.
Im Tiefen See 45, D-64293 Darmstadt, Germany
Tel.: +49 6151 803−0; Fax: +49 6151 8039100
B2287-1.1 en E−mail: support@hbm.com www.hbm.com