9023927 - 2nd edition - May 2007
Page 13 of 72 Pages
Installing accessories
Installing accessories
Various accessories are available for the Dräger Polytron 7500 and may also be
installed later.
Relay module Polytron 7500
Intended Use
— For switching of actuators, alarm generators, etc. on the basis of the measured
gas concentration.
Connecting the devices to be switched
●
Open the relay housing using the cross screwdriver (4 screws on the rear side).
●
Install the connection cable in the cable gland, cut to length and strip ends
(approx. 80 mm).
●
Shorten the shield (if installed) to prevent short-circuiting.
●
Connecting the cable:
3 potential-free relay outputs with 250 V / 5 A (AC) switching capability are
available:
1
Fault relay (switches in the case of a device fault)
2
A2 relay (switches when the A2 gas alarm is active)
3
A1 relay (switches when the A1 gas alarm is active)
●
Connect the devices to be switched to the terminals.
Connection assignment of relay module:
●
Close the relay housing again.
— Setting the alarm thresholds: see “Alarm / Relay settings” on page 45.
00923927_1.eps
1
2
3
0
1
02392
7_1_en.eps
red
black
yellow
(normally closed)
(common)
(normally open)
1
1
2
2
3
3