Mounting and installation
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en
Instructions for use
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Dräger PointGard 2000 Series
11
2. Route the power supply cable through the corresponding
cable gland 4.
3. Insert the braids of the power supply cable in the provided
3-pin connector following the wiring tables.
– For the DC version of the instrument:
If a non-shielded cable is used or PE is not connected,
bridge pin 1 and 2.
4. Tighten screws of the connector with correct torque (4.4 ...
5.3 Lbs. In. / 0.5 ... 0.6 Nm).
5. Secure the cable cores by tightening a cable tie around
them.
6. Plug the power supply connector into the appropriate
power supply socket.
– For DC: Power supply socket 16
– For AC: Power supply socket 15
7. Tighten screws with correct torque (4.4 ... 5.3 Lbs. In. / 0.5
... 0.6 Nm).
8. Close the instrument.
4.4 Mounting
the
instrument
The instrument can be directly mounted through the internal
mounting holes or by using the optional stainless steel
mounting brackets (83 26 497).
To mount the instrument without brackets:
1. Prepare an even surface following the assembly
instruction (90 33 793) or the dimensions indicated on the
back of the housing
– Keep enough space clear for maintenance purposes
and sensor change:
To the left: 200 mm / 8’’
Downwards: 180 mm / 7’’
– Mount the instrument using screws. For recommended
screw properties see 18.1.4 Mounting screws.
4.5 Interface
connections
4.5.1 Preparation for interface connections
1. Open the instrument.
2. Remove the dome plug from the appropriate cable gland.
– For relay connections: Cable gland 5
– For 4-20mA interface connections: Cable gland 3
3. Tighten the counter nut with correct torque (13 +/- 4.4 Lbs.
In. / 1.5 +/- 0.5 Nm).
4. Strip wire insulation by 5 to 7mm.
5. Use a ferrule for stranded conductors.
6. Proceed with the appropriate step.
4.5.2 Relay connections
Relay connections allow triggering of external alarm devices.
9-pin connector
A 9-pin connector is provided for relay wiring.
WARNING
Risk of electric shock
Voltage differences can cause insulation faults.
►
Do not mix electric loads with different voltage types (AC
or DC).
►
Using DC loads, make sure that relay contacts only control
devices with the same DC voltage rating (e. g.
≤
120 V)
►
Using AC loads, make sure that relay contacts are only
connected to devices sharing a common phase.
WARNING
Risk of electric shock
Exceeding extra low voltage (ELV) can cause electric shocks.
ELV limit for AC
≤
50 V
ELV limit for DC
≤
120 V
►
If ELV exceeds the limits, connect pin 2 (PE) of the power
supply connector to protective earth.
Wiring table relay connection
With factory default settings and during normal operation, the
relays are energized. This provides “failsafe” operation.
Relay connector
The relay labels (NO, COM, NC) represent the default state
(normally energized) of all relays while the instrument is
powered.
Connecting the 9-pin connector
1. Route the relay wires through the corresponding cable
gland.
2. Insert the relay wires in the provided 9-pin connector.
a. Connect the wires for A1 (pre-alarm), A2 (main alarm),
and FLT (fault relay) to the terminals.
b. Check the correct connection with the wiring table and
the marks on the circuit board.
c. Secure the cable cores by tightening a cable tie
around them.
3. Plug the 9-pin connector into the socket and tighten
screws with correct torque (4.4 ... 5.3 Lbs. In. / 0.5 ... 0.6
Nm).
Connecting relays
Connecting 4-20mA Inter-
face
Pin
Mark
Relay
1
NC
A1
A1 Normally
Closed
2
COM
A1 Common
3
NO
A1 Normally
Open
4
NC
A2
A2 Normally
Closed
5
COM
A2 Common
6
NO
A2 Normally
Open
7
NC
FLT
Fault Normally
Closed
8
COM
Fault Common
9
NO
Fault Normally
Open
