TC · Edition 08.17 42
Accessories
6 Accessories
6.1 Socket
Standard socket, 3 pins + PE, black/B:
Order No. 74916715
6.2 Valve connection cable
Standard socket, 3 pins + PE, black,
4-core electrical cable, cable length 0.45 m, Order
No. 74960 689
6.3 External pressure switch for TC 4
DG DG..C
Gas pressure switches DG, DG..C for monitoring the
pressure between the valves to be checked.
For inlet pressures of 0.5 to 500 mbar (0.2 to 195 "WC).
The switching differential may not exceed ±10% of the
set switching pressure
(see Technical Information bulletin Pressure switch for
gas DG, DG..C at www.docuthek.com).
Adjustment
The external pressure switch is set to half the inlet pres-
sure p
u
/2 (only NO contact required) in order to check
both valves with equal sensitivity.
Example: p
u
= 100 mbar (39 "WC),
set switching pressure p
u
/2 = 50 mbar (19.5 "WC).
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