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Installation
3.3
Mechanical installation
Use the drilling template for mounting on a flat surface.
The mounting surface should be even.
Dräger recommends using M6, 1/4" bolts with hex socket
caps.
The instrument must be accessible for maintenance (e.g.
calibration).
The future use of accessories and maintenance equipment
must be kept in mind.
The access of the gas or vapor to the sensor must not be
obstructed.
3.4
Electrical installation without Docking
Station
CAUTION
! !
Ensure wiring for relays and connections for sensor
are made before applying power.
Ensure that the correct setting for 2 or 3-wire operation
is selected and matches the installed wiring of the
instrument. Otherwise, false signals may be displayed
if the menu does not match the menu configuration.
3.4.1
Power and signal wiring
Loosen set-screw and unscrew lid from instrument.
1. Pull out the bezel by grasping the notches on either side of
the display with your fingers and carefully pull it out from
the enclosure.
Turn bezel over and pull off the 3-pin connector.
10
Connect the wires for power and signal to the appropriate
terminal as indicated in the following wiring table and
figure. Fasten terminal screws with the correct torque
according to the table tightening torque and wire size for
field wiring terminal, see Section 9.9 on Page 28.
If operated as a stand-alone instrument (3-wire only), wire
pin 1 to pin 3.
Plug connector back into socket and tighten screws.
The cable shielding should only be connected at the
controller.
Place bezel back into the enclosure.
Screw the lid back on, until it is seated (see Section 9.8 on
Page 28), and tighten set-screw.
3 Pin Connector (Power and Signal)
Pin
1
Mark
+
Function
V +
(3 wire)
Function
V +
(2 wire)
Open: no connection
3.4.2
Relay option
WARNING
!
At voltages >30 V AC or >42.2 V DC, the relay cables
must be enclosed in protective tubing, or double-
insulated cables must be used.
If the relay option has been installed (3-wire configuration
only), the wires for the alarm devices will be connected to the
9-pin connector. A piece of wire insulation (heat shrink tube)
and rubber boot are supplied for extra protection for relay
wires.
Turn bezel over and pull off the 9-pin connector.
Cut the heat shrink tube as needed and slide over the relay
wires before insertion into the 9-pin connector.
Position the heat shrink tube at the edge of wire insulation
and use a heat gun to shrink the tubing securely onto wire
insulation.
Slide rubber boot over the wires.
Connect the wires for alarm 1, alarm 2 and fault to the
terminals, as indicated in the following wiring table. Fasten
terminal screws with the correct torque according to the
table tightening torque and wire size for field wiring
terminals, see Section 9.9 on Page 28.
With factory default settings and during normal operation,
the relays are energized. This provides "fail-safe"
operation. The terminal designators indicated in the
following wiring table are shown as factory default and
normal operation mode, see Section 6 on Page 25.
Plug connector back into socket and tighten screws.
Put rubber boot over connector.
2
3
-
4-20
4-20 mA
V -
signal
4-20 mA
-
signal
Dräger Polytron 5100
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