Siemens TC12 User's Guide download pdf (Page 176)

TC12 Installation, Commissioning & Maintenance Handbook

666/HE/43100/000 Page 166 Issue 10

5.4 MAINTENANCE

A 1 A mains input fuse (part number 518/4/98042/001) is located within the front

panel fuseholder. A 2 A fuse (part number 518/4/98009/004) within the chassis

unit provides protection against certain types of traffic control equipment fault, e.g.

a supply rail wrongly connected to the common signal return wire.

The mains plug is fused with a 2 A fuse (part number 518/4/98020/001)

The PSU (part number 605/4/97029/014) is a Coutant Power Pack (Model HSB12-

1.7) rated at 12 V 1.7 A fully regulated. The unit supplies power to the two printed

circuit boards (i.e. logic circuitry and relays) and LEDs.

1 2 ... 171 172 173 174 175 176 177 178 179 180 181 ... 202 203

No comments

Siemens TC12 User's Guide Page 176