Product summary  
   The SR250 impulsers are deliverable for various applications and suitable for almost every slave-clock.
The SR400, specially designed for  battery supply, suitable for built-in applications

                                                                                          Features SR250-D/H/M/Wbu-B

Each SR250 impulser produces, selectable,  minute, half-minute or seconds pulses for single or dual polairity slaves.  Dials up to 24V=, optional 48V=.

Selectable impulslength: 0.6 or 2 seconds. For some towermovements: 0.6 or 6 seconds, see D8bu-TU below.

Receivers: DCF (D) or  MSF(UK)

Impulsers are fitted with a time-backup. In case of a power failure, "the position" of the hands is written to a memory chip. Storage unlimited. After power restore the SR250 reads this chip and calculates/executes the dial correction.

OPTION: axiliary output to drive a relay for hour and half-hour bell ringing or options for master clocks that were originally synchronised by radio or telegraph signals. See D12 and D15 below.

Fuse to protect the strong Darlington output-stage and for safety reasons.
 

                                                                                Impulsers with a timesignal receiver.
                  Are running exact on time and correction between summer and winter time is made automatically.

The first letter signs the timesignal to what the concerning SR250 is suitable for:
D:DCF(D), M:MSF(GB).

D8bu, M8bu,
Minute or half-minute single pulse, 0.6 or 2 seconds long. Second pulse 0.6 second. Time-backup: storage unlimited.
These impulsers are suitable for most slaves.




                                                                                Impulsers for special applications
                                           Except the D32-B, all impulsers are fitted with a time-backup. Storage is unlimited                                                                     

D8bu-TU-B, H8bu-TU-B, H8bu-TU-B, W8bu-TU-B
For some towermovements  requiring a long pulse. Per minute or half-minute 2 relays can be driven separate with 2 external diodes.
Minute or half-minute single pulse, 0.6 or 6 seconds long. Second pulse 0.6 second long.

D8bu-SSW-B, M8bu-SSW-B, H8bu-SSW-B, W8bu-SSW-B
Only for IBM/Simplex/ITR and Z+M slaves, supplied with a change-over contact. Adjustable for a 2- (with diode) or 3- wire system.  For exact time move of the minute hand, movement is powered the 59th second, during one second.
Click here for info about both systems.
Single minute pulse, 1 second long.

D8bu-24U-B, M8bu-24U-B, H8bu-24U-B, W8bu-24U-B
Only for slaves with a 24 hour dial, for example a led- or a  
Minute or half-minute single pulse, 0.6 or 2 second long. Second pulse  0,6 second long.

D12bu-B
Auxiliary output prodeces 6 pulses, 0.1 second long, during the last 6 seconds of each hour starting at the 55th second. This facility is for master clocks that were originally synchronised by radio or telegraph signals.
Minute or half-minute single pulse, 0.6 or 2 seconds long. Second pulse 0,6 second long.

D15bu-B
Auxiliary output produces 1 pulse, 0.5 second long, at 0.00 and at 12.00.
This facility is for master clocks that were originally synchronised by radio or telegraph signals.
By request other times

D32-B No time-backup
Unit is only for driving 3 bells, via 3 external relays (not included).
Click here for the possible ringing.
Single pulse, 0.5 second long