Bell & Gossett 176R0649C Technologic 502 Series Pump Controller User Manual
Page 6
6
Type S-1 Controller (with or without manual by-
pass)
The type S-1 controller comes in two different con-
figurations. One consists of a Technologic 502 master
with embedded pump controller software with up to
three follower drives. The other S-1 configuration is
the same with the addition of a manual bypass for the
master and a manual bypass for each follower drive.
The controller allows parallel operation between the
master and follower drives in response to a set point.
All drives will run at the same synchronized speed.
Figure 1-2. Master Drive with Two Followers
A-0 (1 Technologic 502 Master 0nly)
A-M (1 Technologic 502 Master only with manual
bypass)
C-0 (1 Technologic 502 Master with (1) follower – No
Staging)
C-M (1 Technologic 502 Master with (1) follower each
with manual bypass – No Staging)
D-0 (1 Technologic 502 Master with (up to 3) follow-
ers – Staging Allowed)
D-M (1 Technologic 502 Master with (up to 3) followers
each with manual bypass – Staging Allowed)
Input power panel
Master drive
Follower 1
Follower 2
Input power raceway to VFDs
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