Special problems are encountered in DC-operated rail ways when it comes to contact and corrosion protection. On the one hand, electrical DC should be kept out of con tact with the ground as far as possible to avoid cor ro sion, on the other hand.
Technical Data
Dimensions
W / H / D
see drawing
Housing
Polyester / Makrolon
Attachment
Wall attachment straps
Protection
IP 55
Ambient temp.
-20°C to +70°C
Voltagelimiting device
type 8961
Trigger value
120 V + 20% (bi-directional)
Transient load
see Data sheet part no. 250150
Short-circuit-load
see Data sheet part no. 250150
Monitoring unit
Type
type 853800
Power supply
AC 230 V
Power
consumption
approx. 3 VA
Measuring input
approx. 1 M?
Adjustment
programing
Output contact
1 change-over contact (potential-free)
trigger-delayed approx. 1 min
to 108 h
voltage current
AC
250 V 4.0 A (cos?
> 0.7)
DC
110 V 1.0 A (ohmic)
Displays
by LED
Connections
Power supply
? 4 mm²
Message contact
? 4 mm²
Earth potential
threaded bolt M16
Ordering Information
Type 8900
Order No. 240100
