Page 78 of 188
Clock Controller Installation
553-2901-200 Standard 11.00 August 1996
Table 23
Clock Controller switch settings for QPC471 vintage H
System
SW1
SW2
SW4
ST, STE, 21A, 21, 21E
on
on
on
on
off
off
off
off
off
off
off
off
SN
on
on
on
on
on
on
on
on
off
off
off
off
RT, NT, 51/51C, 61/61C
on
on
on
on
off
off
off
off
off
on
*
*
XN, XT, 71, 81/81C
off
off
off
off
off
off
off
off
off
on
*
*
Cable length between the
J3 faceplate connectors:
0-4.3 m
(0-14 ft.)
off
off
4.6–6.1m
(15–50 ft.)
off
on
6.4–10.1m
(21–33 ft.)
on
off
10.4–15.2 m
(34–50 ft.)
on
on
• If there is only one Clock Controller card in the system, set to OFF. If there are two Clock Controller cards,
set to match the cable length between the J3 faceplate connectors. Determine the total cable length (no
single cable can exceed 25 ft.) between the J3 connectors. Both cards must have the same setting.
Table 24
Clock Controller switch settings for QPC775
System
SW2
SW3
SW4
NT, RT, ST, STE, 21, 21A,
21E, 51/51C, 61/61C
ON
OFF
ON
SN
ON
ON
OFF
XN, XT, 71, 81/81C
OFF
OFF
ON
