Electrical Connection; Shielding And Cable Routing - Balluff BTL7-A/C/E/G5 Serie Manual Del Usuario

BTL7-A/C/E/G5_ _-M_ _ _ _-B/Z-DEX_-K_ _/KA_ _
Micropulse Transducer - Rod Style
4
Installation and connection (continued)
4.4

Electrical connection

The electrical connection is permanent and made using a
cable. For the connection assignments, see Tab. 4-1.
Cable color BTL7-A510-...
1)
YE Yellow
1)
PK Pink 10...0 V
1)
GN Green 0...10 V
GY Gray
BU Blue
BN Brown
RD Red
WH White
1) In addition to the gray wire 0 V, only one output signal may be connected, i.e. either the yellow, pink, or green wire!
2) Unassigned leads must be connected to the GND on the controller side but not to the shield.
3) Because of the separate output drivers there are small voltage differences between these two output signals
(constant offset < 10 mV).
4) Reference potential for supply voltage and EMC-GND!
Tab. 4-1: Connection assignments
4.5

Shielding and cable routing

Defined ground!
Please note that the position measuring system
must be connected to the potential equalization
system in accordance with the requirements in
DIN EN 60079-14. The external connection is
accomplished by means of metallic conducting
installation in a grounded area. The flange and
housing are mechanically fixed with electrically
conductive connections, so that no potential
differences can occur between them.
If a metallic conducting installation location is
not possible, the housing must be connected
via the ground screw on the cover.
The transducer and the control cabinet must be
at the same ground potential. A sufficient
potential equalization is required that cannot be
conducted over the cable shield!
Shielding
To ensure electromagnetic compatibility (EMC), observe
the following:
– Connect transducer and controller using a shielded
cable.
Shielding: Braided copper shield with minimum 85%
coverage.
– Cable version: On the transducer side, the cable
shielding is connected to the housing.
Ground the cable shielding on the controller side
(connect with the protective earth conductor).
www.balluff.com
BTL7-G510-... BTL7-C500-...
2)
Not used 0...20 mA
10...–10 V
–10...10 V
La (programming input)
Lb (programming input)
Ignition protection "d"
Flameproof enclosure
Note the information on shielding and cable
routing (see Section 4.5).
BTL7-C570-... BTL7-E500-...
20...0 mA 4...20 mA
3)
10...0 V
3)
0...10 V
0 V
4)
GND
10...30 V
Magnetic fields
The position measuring system is a magnetostrictive
system.
It is important to maintain adequate distance between the
transducer/holding cylinder and strong, external magnetic
fields.
Cable routing
Do not route the cables between the transducer, controller,
and power supply near high voltage cables (inductive stray
noise is possible).
Inductive stray noise from AC harmonics (e.g. from phase
angle controls) are especially critical and the cable shield
offers very little protection against this.
The installed cable fitting was tested with reduced tensile
force in accordance with EN 60079-0. This is why the
connection cable must be routed in a permanent location
and protected against tension and rotary loads using an
additional clamp. It may not be used with drag chains.
Bending radius for fixed cable
The bending radius for a fixed cable must be at least five
times the cable diameter.
Cable length
1)
BTL7-A/G Max. 30 m
BTL7-C/E Max. 100 m
1) Prerequisite: Construction, shielding and routing preclude the effect of
any external noise fields.
Tab. 4-2: Cable lengths BTL7
BTL7-E570-...
20...4 mA
1)
english 13