Partlow MRC 7000, Installation & Operation Manual

Page: 16 / 64

16
2.6.4 OUTPUT CONNECTIONS
Relay output(s) if provided in the instrument may be assigned to alarm output functions for
Pen 1 and/or Pen 2 (if present) if instrument is recorder. Relay outputs, if instrument is a limit
device, may be assigned to limit output functions. Current outputs may be assigned to
process value retransmission output for Pen 1 and/or Pen 2 (if present). The assignment of
the output function is accomplished in the Program mode, see Table 3-2 (page 28). SPST
relay and/or SSR driver output(s) is/are designated as Relay A through Relay H. SPST relays
begin with Relay A designation, then B, C, etc. SSR drivers begin with Relay H designation
then G, F, etc. except when 4 SSR drivers are required in conjunction with SPDT relays, then
designation E & F are not available. SSR driver designation becomes G, H, D, and C. SPDT
relay output(s) are designated as Relay A and Relay B only.
FIGURE 2-10A
SPST Relay Output
Connections are made to relays A through F as shown. Terminal connections are made using
TB6 (Relay/SSR Driver A, B), TB7 (Relay/SSR Driver C, D), and TB8 (Relay/SSR Driver E,
F).
FIGURE 10B
SPDT Relay Output
FIGURE 2-11
SSR Driver Output
Connections are made to relays H through A as shown.
1 2 3
LOAD
POWER
HOT
TB6 Relay A
TB7 Relay B
NEU
5 AMPERES
MAXIMUM
AT 115 VAC
N.O. C N.C.
1 2 3 4
SSR
+ -
TB6 THRU TB9
SOLID STATE RELAY
TB9 SSRD G, H - all cases
TB8 SSRD E, F - no SPDT relays
TB8 SSRD C, D - SPDT relay/s E and F not available
1 2 3 4
LOAD
POWER
HOT
TB6 Relay A & B, Relay A Terminals 1 & 2
TB7 Relay C & D, Relay C Terminals 1 & 2
TB8 Relay E & F, Relay D Terminals 1 & 2
NEU
5 AMPERES
MAXIMUM
AT 115 VAC
N.O. C N.O. C