Model number-ordering information, A.11, Model number – Watlow Series 988 User Manual
Page 161: Ordering information
WATLOW Series 988 User’s Manual
A.11
Appendix
Model Number
Ordering Information
(1237)
To order, complete the code number to the right with the information below:
9 8 _ _ - _ _ _ _ - _ _ _ _
Series 988: a single-channel, temperature/process controller,
1 analog input, 1 digital input, 1 analog or digital input, 4 outputs.
Power Supply & Mounting
6
= 24 to 28V
ı
(ac/dc) nominal, vertical mounting
7
= 24 to 28V
ı
(ac/dc) nominal, horizontal mounting
8
= 100 to 240V
ı
(ac/dc) nominal vertical mounting
9
= 100 to 240V
ı
(ac/dc) nominal horizontal mounting
Software
A
= Standard
B
= Enhanced (Includes cascade, ratio, |
duplex, dual PID set)
Input 1
1
= Thermocouple only (Excluding Type B, R, and S)
2
= Universal signal conditioner
Input 2
0
= None
1
= Thermocouple only (Excluding Type B, R, and S)
2
= Universal signal conditioner
3
= Slidewire feedback
4
= Current transformer
2
5
= Digital contact event (One digital event is standard on all units)
Output 1
B
= Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C
= Switched dc or open collector, isolated
D
= Electromechanical relay
1
, Form C, 5A with RC suppression
E
= Electromechanical relay
1
, Form C, 5A without contact suppression
F
= Universal process, 0-5V
Î
(dc), 1-5V
Î
(dc), 0-10V
Î
(dc),
0-20mA, 4-20mA, isolated
K
= Solid-state relay, Form A, 0.5A, without contact suppression (NO & C)
Output 2
A
= None
B
= Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C
= Switched dc or open collector, isolated
D
= Electromechanical relay
1
, Form C, 5A with RC suppression (NO, NC & C)
E
= Electromechanical relay
1
, Form C, 5A without contact suppression (NO, NC & C)
F
= Universal process 0-5V
Î
(dc), 1-5V
Î
(dc), 0-10V
Î
(dc),
0-20mA, 4-20mA, isolated
K
= Solid-state relay, Form A, 0.5A, without contact suppression (NO & C)
T
= External signal conditioner power supply, 5, 12 or 20V
Î
(dc) @ 30mA
Output 3
A
= None
B
= Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C
= Switched dc or open collector, isolated
J
= Electromechanical relay
1
, Form A or B, 5A without contact suppression (NO or NC)
K
= Solid-state relay, Form A, 0.5A without contact suppression (NO & C)
M
= Retransmit, 0-20mA, 4-20mA
N
= Retransmit, 0-5V
Î
(dc), 1-5V
Î
(dc), 0-10V
Î
(dc)
T
= External signal conditioner power supply, 5, 12 or 20V
Î
(dc) @ 30mA
Output 4
A
= None
B
= Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C
= Switched dc or open collector, isolated
D
= Electromechanical relay
1
, Form C, 5A with RC suppression (NO, NC & C)
E
= Electromechanical relay
1
, Form C, 5A without contact suppression (NO, NC & C)
K
= Solid-state relay, Form A, 0.5A without contact suppression (NO & C)
R
= EIA/TIA-232 communications, opto-isolated
S
= EIA/TIA-485 / EIA/TIA-422 communications, opto-isolated
T
= External signal conditioner power supply, 5, 12 or 20V
Î
(dc) @ 30mA
U
= EIA/TIA-485 / EIA/TIA-232 communications, opto-isolated
Display
GG = Green/Green displays
RR =
Red/Red displays
GR = Green/Red displays
XX =
Custom overlays or default settings
RG = Red/Green displays
1
Electromechanical relays
warranted for 100,000 clo-
sures only. Solid-state
switching devices recom-
mended for applications
requiring fast cycle times or
extended service life.
2
A Current Transformer input
cannot be used in conjunc-
tion with a process output
installed on output 1.
Slo-Blo
®
is a registered
trademark of Littelfuse, Inc.